Fatto generale: 981 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 981 is the smallest number that has 5 different partitions into 3 parts with the same product.
Trivia: 981 is a boring number.
Data storica: September 7th is the day in 1906 that Alberto Santos-Dumont flies his 14-bis aircraft at Bagatelle, France for the first time successfully.