Fait mathématique: 2933 is a value of n for which s(f(n)) = 2s(n).
Culture générale: 2933 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: January 11th is the day in 1960 that Henry Lee Lucas, once listed as America's most prolific serial killer, commits his first known murder.