Fait mathématique: 5323 is an unremarkable number.
Culture générale: 5323 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: July 28th is the day in 1945 that a U.S. Army B-25 bomber crashes into the 79th floor of the Empire State Building killing 14 and injuring 26.