Fatto generale: 7929 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 7929 is an unremarkable number.
Trivia: 7929 is an uninteresting number.
Data storica: September 15th is the day in 1981 that the Senate Judiciary Committee unanimously approves Sandra Day O'Connor to become the first female justice of the Supreme Court of the United States.