Fait mathématique: 8718 is the smallest n for which S_{k=n} 1/(k ln k) = 3.
Culture générale: 8718 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: November 13th is the day in 1851 that the Denny Party lands at Alki Point, before moving to the other side of Elliot Bay to what would become Seattle, Washington.