1739 = 37 x 47.
1739 has a base 5 representation (23424) that begins with its base 9 representation (2342).
1739 is a value of n for which n8, n9, n10, and 1011 all have the same digit sum.
1739 is a number such that its square is the sum of three successive primes (A076304).
1739 is a number that becomes prime (139, 173, 179, 739) if any one digit is deleted (A034304).
The sum of the digits of 1739 exceeds the sum of the digits of its square (A064399).
Source: What's Special About This Number?