ⓘ 129 (number)

ⓘ 129 (number)

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 {\displaystyle 11^{2}+2^{2}+2^{2}}, 10 2 + 5 2 + 2 {\displaystyle 10^{2}+5^{2}+2^{2}}, 8 2 + 8 2 + 1 2 {\displaystyle 8^{2}+8^{2}+1^{2}}, and 8 2 + 7 2 + 4 2 {\displaystyle 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.

1. In the military

• USNS Mission San Miguel T-AO-129 was a United States Navy Mission Buenaventura -class fleet oilers during World War II
• 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 Donald W. Wolf APD-129 was a Crosley-class high speed transport of the United States Navy
• Soviet submarine K-129 1960 was a Soviet Pacific Fleet nuclear submarine that sank in 1968
• USS Vital AM-129 was a United States Navy Auk -class minesweeper for removing naval mines laid in the water
• 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

2. In transportation

• 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.
• LZ 129 Hindenburg was a German zeppelin which went up in flames while landing on May 6, 1937

3. 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

• Saros cycle series 129 for solar eclipses occurs at the Moon s ascending node, repeating every 18 years, 11 days, containing 80 events. All eclipses in
• natural number following 127 and preceding 129 128 is the seventh power of 2. It is the largest number which cannot be expressed as the sum of any number of
• portal U.S. Roads portal List of highways in Puerto Rico List of highways numbered 129 Transito Promedio Diario AADT Transit Data Datos de Transito in
• of MIL - STD - 129 However, for all type of containers the basic format such as National Stock Number NSN item description and part number are mandatory
• TAI AgustaWestland T 129 ATAK is a twin - engine, tandem seat, multi - role, all - weather attack helicopter based on the Agusta A 129 Mangusta platform. The T 129 was developed
• Form I - 129 Petition for a Nonimmigrant Worker is a form submitted to the United States Citizenship and Immigration Services used by employers or prospective

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