Fatto generale: 17691 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 17691 is an uninteresting number.
Trivia: 17691 is a boring number.
Data storica: June 7th is the day in 1982 that Priscilla Presley opens Graceland to the public; the bathroom where Elvis Presley died five years earlier is kept off-limits.