Fait général: 61909 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 61909 is an unremarkable number.
Culture générale: 61909 is an unremarkable number.
Date historique: July 1st is the day in 1915 that Lieutenant Kurt Wintgens achieves the first known aerial victory with a synchronized gun-equipped fighter plane, the Fokker M.5K/MG Eindecker.