Fait mathématique: 5187 is the only number n known for which f(n-1) = f(n) = f(n+1).
Culture générale: 5187 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: March 14th is the day in 1964 that a jury in Dallas, Texas, finds Jack Ruby guilty of killing Lee Harvey Oswald, assumed assassin of John F. Kennedy.