general_fact: 87841 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 87841 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 87841 is an unremarkable number.
historical_date: July 1st is the day in 69 that Tiberius Julius Alexander orders his Roman legions in Alexandria to swear allegiance to Vespasian as Emperor.