129 (number)

129 is the natural number following 128 and preceding 130.

Number|number = 129
range = 120
cardinal = one hundred [and] twenty-nine
ordinal = th
ordinal text = one hundred [and] twenty-ninth
numeral = 129
factorization = $3\; cdot\; 43$
prime =
divisor = 1, 3, 43, 129
roman = CXXVIIII
unicode =
greek prefix =
latin prefix =
bin = 10000001
oct =
duo =
hex = 81
misc =

In mathematics

129 is the sum of the first ten prime numbers. It is the smallest number that can be expressed as a sum of three squares in four different ways: $11^2+2^2+2^2$ and $10^2+5^2+2^2$ and $8^2+7^2+4^2$.

However, it is the product of only two primes, 3 and 43, making 129 a semiprime. Since 3 and 43 are both Gaussian primes, this means that 129 is a Blum integer.

129 is a repdigit in base 6 (333).

In the military

* Raytheon AGM-129 ACM (Advanced Cruise Missile) is a low observable, sub-sonic, jet powered, air-launched cruise missile used by the United States Air Force
* USNS Mission San Miguel (T-AO-129) was a United States Navy Mission Buenaventura-class fleet oilers during World War II
* USS Donald W. Wolf (APD-129) was a Crosley class high speed transport of the United States Navy
* USS Edsall (DE-129) was the lead ship of her class of destroyer escort in the United States Navy
* USS Marvin H. McIntyre (APA-129) was a United States Navy Haskell-class attack transport during World War II
* USS Phobos (AK-129) was a United States Navy Crater-class cargo ship during World War II
* USS Vital (AM-129) was a United States Navy Auk-class minesweeper for removing mines from minefields laid in the water

In transportation

* U.S. Route 129 runs from Knoxville, Tennessee to Chiefland, Florida
* M-129 is a Michigan highway
* Highway 129 is a provincial highway in the Ontario, Canada
* LZ 129 Hindenburg was a German zeppelin which went up in flames while landing on May 6, 1937
* London Buses route 129 is a Transport for London contracted bus route in London
* STS-129 is a planned Space Shuttle Endeavour mission to the International Space Station to be flown no earlier than July of 2009

In other fields

129 is also:
* The year AD129 or 129 BC
* 129 AH is a year in the Islamic calendar that corresponds to 746 – 747 CE
* 129 Antigone is a main belt asteroid
* The atomic number of Unbiennium, an element yet to be discovered
*A film format: 129 film
* Liberia ranks #129 in world population
* Dent v. West Virginia, ussc|129|114|1889, was an important United States Supreme Court case involving the reputable practice of physicians and state laws
* Sonnet 129 by William Shakespeare
* The TV series Becker ran on CBS from 1998 to 2004 for 129 episodes
* Channel 129 on Sirius Satellite Radio is CNBC
* Channel 129 on XM Radio is Bloomberg Radio
* Baseball’s Sammy Sosa followed up his 66 home run total in 1999 with 63 in 2000, for a combined 2-year total of 129 home runs
* The 129th Kentucky Derby was won by Funny Cide on May 3, 2003
* The 129th Westminster Kennel Club Dog Show was won by Ch. Kan-Point's VJK Autumn Roses, a German Shorthaired Pointer on February 16, 2005

See also

* List of highways numbered 129
* United Nations Security Council Resolution 129

"This page discusses the number 129. For the year, see 129."