General fact: 83897 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 83897 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 83897 is a boring number.
Historical date: September 13th is the day in 1964 that South Vietnamese Generals Lam Van Phat and Duong Van Duc fail in a coup attempt against General Nguyen Khanh.