General fact: 83500 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 83500 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 83500 is an uninteresting number.
Historical date: August 12th is the day in 1985 that Japan Airlines Flight 123 crashes into Osutaka ridge in Gunma Prefecture, Japan, killing 520, to become the worst single-plane air disaster.