Fatto matematico: 8734 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 8734 is an uninteresting number.
Data storica: November 29th is the day in 1394 that the Korean king Yi Seong-gye, founder of the Joseon Dynasty, moves the capital from Kaesŏng to Hanyang, today known as Seoul.