Fatto generale: 9775 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 9775 is a number n so that the sum of the digits of n^{n}-1 is divisible by n.
Trivia: 9775 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: October 5th is the day in 1905 that Wilbur Wright pilots Wright Flyer III in a flight of 24 miles in 39 minutes, a world record that stood until 1908.