Fait mathématique: 17419 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Culture générale: 17419 is an uninteresting number.
Date historique: September 9th is the day in 1513 that James IV of Scotland is defeated and dies in the Battle of Flodden Field, ending Scotland's involvement in the War of the League of Cambrai.