Fatto generale: 14009 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 14009 is an uninteresting number.
Trivia: 14009 is an uninteresting number.
Data storica: May 9th is the day in 1904 that the steam locomotive City of Truro becomes the first steam engine in Europe to exceed 100 mph (160 km/h).