Fait général: 1397 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 1397 is an uninteresting number.
Culture générale: 1397 is a boring number.
Date historique: October 28th is the day in 2009 that NASA successfully launches the Ares I-X mission, the only rocket launch for its later-cancelled Constellation program.