General fact: 91979 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 91979 is a boring number.
Trivia: 91979 is a boring number.
Historical date: October 30th is the day in 1974 that the Rumble in the Jungle boxing match between Muhammad Ali and George Foreman takes place in Kinshasa, Zaire.