Fait général: 87891 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 87891 is an uninteresting number.
Culture générale: 87891 is an unremarkable number.
Date historique: August 20th is the day in 1998 that the Supreme Court of Canada rules that Quebec cannot legally secede from Canada without the federal government's approval.