Hecho matemático: 91684 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 91684 is an unremarkable number.
Fecha histórica: January 8th is the day in 1996 that an Antonov 32 cargo turboprop powered plane crashes into the central market in Kinshasa, Zaire killing more than 350 people.