Fatto matematico: 9793 is the smallest number that can be written as the sum of 4 distinct positive cubes in 5 ways.
Trivia: 9793 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: October 23rd is the day in 1906 that Alberto Santos-Dumont flies an airplane in the first heavier-than-air flight in Europe at Champs de Bagatelle, Paris, France.