129 (one hundred [and] twenty-nine) is the natural number following 128 and preceding 130.
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
,
10
2
+
5
2
+
2
2
,
8
2
+
8
2
+
1
2
, and
8
2
+
7
2
+
4
2
.
129 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).
129 is a happy number.
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
Soviet submarine K-129 (1960) was a Soviet Pacific Fleet nuclear submarine that sank in 1968
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
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 was a Space Shuttle mission to the International Space Station, flown in November 2009 by the shuttle Atlantis.
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
Sonnet 129 by William Shakespeare
