Fatto generale: 9304 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 9304 is 65128 / 7, and each digit is contained in the equation exactly once.
Trivia: 9304 is a boring number.
Data storica: June 21st is the day in 1982 that John Hinckley is found not guilty by reason of insanity for the attempted assassination of U.S. President Ronald Reagan.