Fatto generale: 91491 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 91491 is an uninteresting number.
Trivia: 91491 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: June 29th is the day in 2002 that Naval clashes between South Korea and North Korea lead to the death of six South Korean sailors and sinking of a North Korean vessel.