Fatto matematico: 1737 is a value of n so that (n-1)^{2} + n^{2} + (n+1)^{2} is a palindrome.
Trivia: 1737 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: October 2nd is the day in 1789 that George Washington sends the proposed Constitutional amendments (The United States Bill of Rights) to the States for ratification.