Fait mathématique: 1413 is the smallest number that can not be formed using the digits 0-7 at most once, together with the symbols + – × and ÷.
Culture générale: 1413 is an uninteresting number.
Date historique: November 13th is the day in 1995 that a truck-bomb explodes outside of a US-operated Saudi Arabian National Guard training center in Riyadh, killing five Americans and two Indians.