Fatto generale: 23009 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 23009 is an unremarkable number.
Trivia: 23009 is a boring number.
Data storica: December 29th is the day in 1812 that the USS Constitution under the command of Captain William Bainbridge, captures the HMS Java off the coast of Brazil after a three hour battle.