General fact: 83536 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 83536 is a boring number.
Trivia: 83536 is a boring number.
Historical date: September 17th is the day in 1462 that the Battle of Świecino (also known as the Battle of Żarnowiec) is fought during Thirteen Years' War.