Английская Википедия:129 (number)
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Шаблон:Infobox number 129 (one hundred [and] twenty-nine) is the natural number following 128 and preceding 130.
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: <math>11^2+2^2+2^2</math>, <math>10^2+5^2+2^2</math>, <math>8^2+8^2+1^2</math>, and <math>8^2+7^2+4^2</math>.
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.[1]
129 is a repdigit in base 6 (333).
129 is a happy number.[2]
129 is a centered octahedral number.[3]
In the military
- Raytheon AGM-129 ACM (Advanced Cruise Missile) was 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
- Шаблон:USNS was a United States Navy Mission Buenaventura-class fleet oilers during World War II
- Шаблон:USS was a Crosley-class high speed transport of the United States Navy
- Шаблон:USS was the lead ship of her class of destroyer escort in the United States Navy
- Шаблон:USS was a United States Navy Haskell-class attack transport during World War II
- Шаблон:USS was a United States Navy Crater-class cargo ship during World War II
- Шаблон:USS was a United States Navy Auk-class minesweeper for removing naval mines laid in the water
- Agusta A129 Mangusta is an attack helicopter originally designed and produced by Italian company Agusta
- The 129th Rescue Wing (129 RQW) is a unit of the California Air National Guard
In transportation
- 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.
In other fields
129 is also:
- The year AD 129 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
See also
References
Шаблон:Reflist Шаблон:Integers
