Fait général: 7783 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 7783 is an unremarkable number.
Culture générale: 7783 is an unremarkable number.
Date historique: April 22nd is the day in 1912 that Pravda, the "voice" of the Communist Party of the Soviet Union, begins publication in Saint Petersburg.