Hecho general: 7971 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 7971 is an unremarkable number.
Trivia: 7971 is an uninteresting number.
Fecha histórica: October 27th is the day in 1962 that a plane carrying Enrico Mattei, post-war Italian administrator, crashes in mysterious circumstances.