Fatto generale: 53877 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 53877 is a boring number.
Trivia: 53877 is an uninteresting number.
Data storica: July 5th is the day in 1803 that the Convention of Artlenburg leads to the French occupation of Hanover (which had been ruled by the British king).