General fact: 2493 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 2493 is an unremarkable number.
Trivia: 2493 is an uninteresting number.
Historical date: October 28th is the day in 1628 that the Siege of La Rochelle, which had lasted for 14 months, ends with the surrender of the Huguenots.