Fatto generale: 964 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 964 is the number of 3×3 sliding puzzle positions that require exactly 12 moves to solve starting with the hole in the center.
Trivia: 964 is a boring number.
Data storica: August 21st is the day in 1968 that James Anderson, Jr. posthumously receives the first Medal of Honor to be awarded to an African American U.S. Marine.