1733

1733 is a prime number. It is a Sophie Germain prime because 2 x 1733 + 1 = 3467 is also prime.

1733 is the smallest prime that contains exactly six smaller primes as substrings: 3, 7, 17, 73, 173, 733.

1733 is palindromic in base 3: 2101012. It is 565 in base 18.

1733 has a representation as a sum of two squares: 1733 = 17² + 38².

1733 is the hypotenuse of a primitive Pythagorean triple: 1733² = 1155² + 1292².

Source: What's Special About This Number?