# 117 (number)

 ← 116 117 118 →
Cardinalone hundred seventeen
Ordinal117th
(one hundred seventeenth)
Factorization32 × 13
Divisors1, 3, 9, 13, 39, 117
Greek numeralΡΙΖ´
Roman numeralCXVII
Binary11101012
Ternary111003
Quaternary13114
Quinary4325
Senary3136
Octal1658
Duodecimal9912
Vigesimal5H20
Base 363936

117 (one hundred [and] seventeen) is the natural number following 116 and preceding 118.

## In mathematics

117 is the smallest possible length of the longest side of a Heronian tetrahedron (one whose sides are all rational numbers).[1][2]

117 is a pentagonal number.[3]

In base 10, 117 is a Harshad number.[4]

## In arts and media

• John-117, the codename for the protagonist in the Halo series.
• Canadian Sci-Fi show First Wave (TV series) had a protagonist named Cade Foster who was identified as Subject 117 by an alien race known as the Gua.

## In other fields

One hundred seventeen is also:

• A substitute for the number 17, which is considered unlucky in Italy. When Renault exported the R17 to Italy, it was renamed R117.[5]
• The number to call Guardia di Finanza for customs/financial/border police in Italy
• The fire emergency telephone number in Portugal
• 1-1-7 was the national emergency telephone number in the Philippines until August 1, 2016, when it was superseded by 9-1-1.[6]
• The police emergency telephone number in Switzerland
• F-117 is the designation of the first operational stealth attack aircraft.
• OSS 117, the codename for the fictional secret agent Hubert Bonisseur de La Bath by author Jean Bruce and later for a film series directed mostly by André Hunebelle.
• Psalm 117 is the exact middle chapter of the King James version of the Bible.
• In The Mystery of Element 117 (1949) by Milton Smith, a window is opened into a new "hyperplane of hyperspace" containing those who have already died on earth.
• The Japanese telephone company NTT provides a non-free speaking clock on the nationally universal number 117.
• The 117 Catholic Martyrs of Vietnam.
• Chinese dragons are usually depicted as having 117 scales.