Hecho matemático: 9477 is the maximum determinant of a binary 13×13 matrix.
Trivia: 9477 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fecha histórica: December 11th is the day in 1815 that the U.S. Senate created a select committee on finance and a uniform national currency, predecessor of the United States Senate Committee on Finance.