Fatto generale: 83973 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 83973 is an uninteresting number.
Trivia: 83973 is an unremarkable number.
Data storica: November 28th is the day in 1895 that the first American automobile race takes place over the 54 miles from Chicago's Jackson Park to Evanston, Illinois.