Hecho general: 91870 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 91870 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 91870 is an uninteresting number.
Fecha histórica: July 13th is the day in 1973 that Alexander Butterfield reveals the existence of the "Nixon tapes" to the special Senate committee investigating the Watergate break in.