Fatto matematico: 1013 is the number of ways 10 people can line up so that only one person has a taller person in front of him.
Trivia: 1013 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: October 9th is the day in 1967 that a day after being captured, Marxist revolutionary Ernesto "Che" Guevara is executed for attempting to incite a revolution in Bolivia.