Fatto generale: 1749 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 1749 is the number of digits in the 4^{th} Cullen prime.
Trivia: 1749 is an uninteresting number.
Data storica: October 14th is the day in 1840 that the Maronite leader Bashir II surrenders to the British Army and then is sent into exile on the islands of Malta.