Fait mathématique: 13893 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Culture générale: 13893 is an uninteresting number.
Date historique: January 13th is the day in 1605 that the controversial play Eastward Hoe by Ben Jonson, George Chapman, and John Marston is performed, landing two of the authors in prison.