Fait général: 47439 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 47439 is a boring number.
Culture générale: 47439 is a boring number.
Date historique: November 18th is the day in 1686 that Charles Francois Felix operates on King Louis XIV of France's anal fistula after practicing the surgery on several peasants.