General fact: 4619 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 4619 is a value of n for which 4n and 5n together use each digit exactly once.
Trivia: 4619 is a boring number.
Historical date: August 23rd is the day in 1990 that Saddam Hussein appears on Iraqi state television with a number of Western "guests" (actually hostages) to try to prevent the Gulf War.