General fact: 47939 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 47939 is an unremarkable number.
Trivia: 47939 is a boring number.
Historical date: April 2nd is the day in 2002 that Israeli forces surround the Church of the Nativity in Bethlehem into which armed Palestinians had retreated.