Fatto matematico: 917 is the only positive number known whose 9^{th} power can be written as the sum of ten 9^{th} powers.
Trivia: 917 is an uninteresting number.
Data storica: July 5th is the day in 2009 that a series of violent riots break out in Ürümqi, the capital city of the Xinjiang Uyghur Autonomous Region in China.