Fatto generale: 4003 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 4003 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 4003 is an uninteresting number.
Data storica: December 16th is the day in 1826 that Benjamin W. Edwards rides into Mexican controlled Nacogdoches, Texas and declares himself ruler of the Republic of Fredonia.