General fact: 83989 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 83989 is a boring number.
Trivia: 83989 is an uninteresting number.
Historical date: December 14th is the day in 1902 that the Commercial Pacific Cable Company lays the first Pacific telegraph cable, from Ocean Beach, San Francisco to Honolulu, Hawaii.