Fatto generale: 63977 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 63977 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 63977 is an unremarkable number.
Data storica: February 28th is the day in 1997 that the North Hollywood shootout takes place, resulting in the injury of 19 people and the deaths of both perpetrators.