Hecho general: 97821 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 97821 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 97821 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fecha histórica: October 28th is the day in 1891 that the Mino-Owari earthquake, the largest inland earthquake in Japan's history, strikes Gifu Prefecture.