Fait mathématique: 5769 is the number of permutations of 9 elements that have 3^{rd} power equal to the identity permutation.
Culture générale: 5769 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: October 17th is the day in 1956 that the first commercial nuclear power station is officially opened by Queen Elizabeth II in Sellafield,in Cumbria, England.