Fatto generale: 89999 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 89999 is an unremarkable number.
Trivia: 89999 is an unremarkable number.
Data storica: May 29th is the day in 1913 that Igor Stravinsky's ballet score The Rite of Spring receives its premiere performance in Paris, provoking a riot.