69 (
sixty-nine) is a number
following
68 and preceding
70.
In mathematics
The
aliquot sum of sixty-nine is 27
within the aliquot sequence (69,27,13,1,0) 69 being the third
composite number in the 13-aliquot
tree.
69 is a
semiprime. Furthermore, since the
two factors of 69 are both
Gaussian
primes, 69 is a
Blum integer.
Adding up the
divisors of 1 through 9 gives
69.
Because 69 has an odd number of 1s in its binary representation, it
is sometimes called an "
odious
number." Of note is that 69² (4 761) and 69³ (328 509) uses
every digit from 0-9. 69 is equal to
105 octal, while 105 is
equal to 69
hexadecimal. This same
property can be applied to all numbers from
64 to 69.
On many handheld scientific and graphing
calculators, the highest
factorial that can be computed within memory
limitations is 69! or 1.711224524*10
^{98}.
The number 69 can be rotated 180° and remain the same.
In science
Astronomy
In sports
- In cricket, 69 is the number of the
South African all-rounder Lance Klusener.
- In the NHL, the number 69 has only been worn
by one player, Mel Angelstad. He
played a total of 2 games in his NHL career. It took over 80 years
for a player to wear this number.
Popular culture
- The number 69 is often considered to have sexual connotations
due to the sex position of the same
name where two persons perform oral sex
upon each other simultaneously.
- The
number 69 is also related to the now demolished Ungdomshuset in Copenhagen, Denmark.
- Thai film named Ruang Talok
69
- The Professional
Wrestling stable D-Generation X
of the WWE sold Football jerseys that read at
the back "Degenerate: 69". The jersey was appropriate since most of
DX's promo/backstage work contained sexual
annotations/references.
- A song written by alternative
rock band R.E.M. by the title of
"Star 69".
- The hit song 96 Tears by Question Mark
& The Mysterians was originally called 69 Tears.
- 69 is the lucky number of both Bill and Ted, as discovered when
(future) Bill and Ted correctly tell (present) Bill and Ted what
their lucky number is in Bill and Ted's Excellent
Adventure outside the Circle-K.
- The band "Seether" has a song called 69 Tea.
- T-Pain has a song called 69 in his album
Epiphany.
In other fields
Sixty-nine may also refer to:
- The registry of the U.S. Navy's aircraft carrier USS Dwight D.
Eisenhower (CVN-69), named after Dwight D. Eisenhower, the 34th
President of the United States and five-star general in the United
States Army
- The
number of the French department Rhône