# 117 number

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**117** is the natural number following 116 and preceding 118.

Template:Numbers 110s | |

Cardinal | one hundred [and] seventeen |

Ordinal | 117th |

Factorization | |

Divisors | 3, 9, 13, 39 |

Roman numeral | CXVII |

Binary | 1110101 |

Hexadecimal | 75 |

**One hundred seventeen** is the smallest possible length of the longest side of a Heronian tetrahedron (one whose sides are all rational numbers). It is also a pentagonal number and a Harshad number.

**In astronomy**, the Saros number of the solar eclipse series which began on 792 June 24 at 05:51:16 UT and will end on 2054 August 3 at 18:01:55 UT. The duration of Saros series 117 is 1262.11 years, and it contains 71 solar eclipses.- The Saros number of the lunar eclipse series which began on 1094 April 3 at 17:26:38 UT and will end on 2374 May 26 at 19:33:35 UT. The duration of Saros series 119 is 1280.14 years, and it contains 72 lunar eclipses.
- The NGC (New General Catalog) [1] object 117, a 15th magnitude spiral galaxy in the constellation Cetus

**One hundred seventeen** is also:

- The film format used by Kodak's first Brownie camera. See 120 film.
- A substitute for the number 17, which is considered unlucky in Italy. When Renault exported the R17 to Italy, it was renamed R117.
- The year AD 117 or 117 BC.
- The number assigned during the SPARTAN-II project to John, the Master Chief from the Halo video game series

fr:117 (nombre) ko:117 ja:117 ru:117 (число) sl:117 (število)