As detailed on TheOtherWiki [[http://en.wikipedia.org/wiki/47_(number) here]], the number 47 has become an in joke among groups of mathematicians and screenwriters, improbable as the crossover may seem.
* One of the biggest users (and according to some, the originator of the trope) is the ''Franchise/StarTrek'' franchise, to the point of having a page on its [[http://memory-alpha.org/wiki/47 wiki]].
* The protagonist of the ''VideoGame/{{Hitman}}'' series.
* Averted by HK-47 from ''KnightsOfTheOldRepublic'', who is named after the AK-47. Same goes for the multitude of fictional guns with [[AKA47 47 in the name]].
* As most (all?) the writers of the ''LeagueOfIntergalacticCosmicChampions'' were ''Franchise/StarTrek'' fans 47s were a big in joke there too.
* Pomona College is big on the number 47 [[http://www.pomona.edu/about/pomoniana/the-mystery-of-47.aspx]] (Connected to the StarTrek example in fact)
* The Wonderbolts of the Blog/ReadingRainbowverse are part of Spec Op group 47.