General fact: 43437 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 43437 is an unremarkable number.
Trivia: 43437 is a boring number.
Historical date: December 4th is the day in 2006 that an adult giant squid is caught on video for the first time by Tsunemi Kubodera near the Ogasawara Islands, 1,000 km (620 mi) south of Tokyo.