Hecho general: 63509 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 63509 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 63509 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fecha histórica: November 17th is the day in 1820 that Captain Nathaniel Palmer becomes the first American to see Antarctica (the Palmer Peninsula is later named after him).