Fatto matematico: 13963 is an unremarkable number.
Trivia: 13963 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: March 24th is the day in 1603 that Tokugawa Ieyasu is granted the title of shogun from Emperor Go-Yozei, and establishes the Tokugawa Shogunate in Edo, Japan.