Fait mathématique: 1017 is the smallest number whose square contains 7 different digits.
Culture générale: 1017 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: October 13th is the day in 1881 that Revival of the Hebrew language as Eliezer Ben-Yehuda and friends agree to use Hebrew exclusively in their conversations.