Fait mathématique: 5698 is the smallest number whose 8^{th} power starts with 5 identical digits.
Culture générale: 5698 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: August 7th is the day in 1794 that U.S. President George Washington invokes the Militia Law of 1792 to suppress the Whiskey Rebellion in western Pennsylvania.