Fatto generale: 913 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 913 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 913 is an unremarkable number.
Data storica: July 1st is the day in 1881 that the world's first international telephone call is made between St. Stephen, New Brunswick, Canada, and Calais, Maine, United States.