Fait général: 53987 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 53987 is a boring number.
Culture générale: 53987 is an unremarkable number.
Date historique: October 23rd is the day in 1295 that the first treaty forming the Auld Alliance between Scotland and France against England is signed in Paris.