Fait général: 23457 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 23457 is an unremarkable number.
Culture générale: 23457 is a boring number.
Date historique: March 21st is the day in 1999 that Bertrand Piccard and Brian Jones become the first to circumnavigate the Earth in a hot air balloon.