General fact: 47439 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 47439 is an unremarkable number.
Trivia: 47439 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Historical date: November 18th is the day in 1940 that New York City's "Mad Bomber" George Metesky places his first bomb at a Manhattan office building used by Consolidated Edison.