Fait mathématique: 91779 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Culture générale: 91779 is an unremarkable number.
Date historique: April 13th is the day in 1613 that Samuel Argall captures Native American princess Pocahontas in Passapatanzy, Virginia to ransom her for some English prisoners held by her father.