Fatto matematico: 63910 is an unremarkable number.
Trivia: 63910 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: December 23rd is the day in 2003 that PetroChina Chuandongbei natural gas field explosion, Guoqiao, Kai County, Chongqing, China, killing at least 234.