629

629 = 17 x 37.

629 is a brilliant number (A078972). It is a semiprime whose prime factors have the same number of decimal digits.

629 is a powerful number (A007532). It can be written as a sum of positive powers of its digits: 629 = 6² + 2⁹ + 9².

629 is 2525 in base 6. It is 275 in base 16 and 125 in base 24.

629 has two representations as a sum of two squares: 629 = 2² + 25² = 10² + 23².

629 is the hypotenuse of two primitive Pythagorean triples: 629² = 100² + 621² = 429² + 460².

Source: On-Line Encyclopedia of Integer Sequences