27 (
twenty-seven) is the
natural number following
26 and preceding
28.
Twenty-seven is the smallest positive integer requiring four
syllables to name in English, though it can be unambiguously
defined in just two: "three cubed."
In mathematics
Twenty-seven is a perfect
cube,
being 3³ = 3 × 3 × 3. 27 is therefore the second smallest cube of a
prime number. 27 is
^{2}3 (see
tetration). There are exactly 27 straight lines on
a smooth
cubic surface. 27 is also a
decagonal number.
27 has an
aliquot sum of 13 and is the
first composite member of the 13-aliquot tree with the aliquot
sequence (27,13,1,0). Twenty-seven is the
aliquot sum of the two odd discrete
biprimes 69 and
133.
In base 10, it is the first
composite
number not evenly divisible by any of its digits. It is the
radix (base) of the
septemvigesimal positional numeral system.
In a
prime reciprocal
magic square of the multiples of 1/7, the magic constant is
27.
In the
Collatz conjecture (aka
the "3
n + 1 conjecture") a starting value of 27 requires
112 steps to reach 1, many more than any lower number.
The unique simple formally real
Jordan
algebra, the exceptional Jordan algebra of self-adjoint 3 by 3
matrices of
quaternions, is
27-dimensional.
In base 10, it is a
Smith number and a
Harshad number.
It is the twenty-eighth (and twenty-ninth) digit in
π.
(3.141592653589793238462643383
279...).
- If you start counting with 0 it is considered one of few
Self-Locating strings in pi.
In science
Astronomy
Electronics
In religion
In music
Wolfgang Mozart was born on
January 27,
1756. He
completed 27 concerti for piano and orchestra.
Many talented and famous rock/blues musicians died at age 27. These
include
Robert Johnson,
Janis Joplin,
Jimi Hendrix,
Brian
Jones,
Jim Morrison,
Ron "Pigpen" McKernan,
Pete
Ham,
Richey Edwards, and
Kurt Cobain. The musicians who died at this age
are often referred to as the
27 Club.
There are
many songs titled just "Twenty-Seven," so it will suffice to list
the most famous: a song by Scottish band
Biffy Clyro from their 2002 album, Blackened
Sky; the song by the Dave
Matthews Band "#27," which they began playing on their 2007
summer tour; the Lagwagon song on their
album Double
Plaidinum. Fall Out Boy also has a song titled
27 from the album
Folie à
Deux (2008).
The number also occurs buried in the lyrics without occurring in
the title. American parodist
"Weird Al"
Yankovic hides the number in many of his songs and videos.
Ben Weasel also likes to include the
number in his songs for his bands
Screeching Weasel and
The Riverdales.
In the United States, the number 27 is associated with the
East Bay punk scene. There is also a band from Boston
simply called
27.
In art
The Minneapolis-based artist
Deuce 7 (a.k.a.
Deuce Seven, Twenty Seven, 27).
In other fields
Twenty-seven is also:
- Gilles Villeneuve's famous
Ferrari number now adopted by his son, Formula One World Champion Jacques Villeneuve in his NASCAR debut
- Right Fielder of the Los Angeles Angels of Anaheim
Vladimir Guerrero's Major League Baseball jersey
number
- The total number of letters in the Hebrew alphabet (22 regular letters and 5
final consonants)
- The current number of Amendments to the United States Constitution
- The modal age of the peak
performance year for major league baseball
position players, according to a commonly accepted theory by
sabermetrician Bill James
- The code for international direct-dial phone calls to South Africa
- The
designation (I-27) of a US interstate highway in Texas
- The
designation (US 27) of a United
States national highway from Fort Wayne, Indiana to Miami,
Florida
- The name of a cigarette, Marlboro Blend No. 27
- The number of outs in a regulation professional baseball game
for each team
- Alternate name for The Hunt, a book by William
Diehl
- The
number of the French department Eure
- Abbé Faria's prisoner number in the book The Count of Monte
Cristo
- In WWE's annual pay-per-view event
Royal Rumble, four WWE
Superstars had won the 30-man Royal Rumble at #27 more times than
any other number, including #1 and #30.
- The number of species Captain Jean-Luc Picard has made contact with in the
series Star Trek: The
Next Generation
- One of the anthropomorphic math
symbols Lisa Simpson imagines talking to her in The
Simpsons episode "Girls Just Want to Have Sums",
that instead of offering the expected pun-based aphorism, rather unhelpfully only says "twenty
seven"
- Known to be the "magic" number in sex, with 27 identified as
the ideal number of participants for an orgy.
- According to little-known socio-agricultural philosopher
Matthew O'Donnell, the Number Of Yorkshire.
- The New York Yankees have won
the World Series 27 times
Historical years
27 B.C.,
27 A.D.,
1827,
1927,
2027, etc.
References