Fait général: 91819 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 91819 is a boring number.
Culture générale: 91819 is an unremarkable number.
Date historique: May 23rd is the day in 1967 that Egypt closes the Straits of Tiran and blockades the port of Eilat at the northern end of the Gulf of Aqaba to Israeli shipping.