Fait général: 10809 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 10809 is an unremarkable number.
Culture générale: 10809 is a boring number.
Date historique: August 4th is the day in 1892 that the father and stepmother of Lizzie Borden are found murdered in their Fall River, Massachusetts home.