Fait mathématique: 7629 is a value of n for which n and 5n together use each digit 1-9 exactly once.
Culture générale: 7629 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: November 19th is the day in 1095 that the Council of Clermont, called by Pope Urban II to discuss sending the First Crusade to the Holy Land, begins.