General fact: 80109 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 80109 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 80109 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Historical date: May 1st is the day in 1974 that the Argentine terrorist organization Montoneros is expulsed from Plaza de Mayo by president Juan Perón.