Number of the day: 689804

Properties of the number 689804:

689804 = 2² × 331 × 521 is the 634008^th composite number and is not squarefree.
689804 has 3 distinct prime factors, 12 divisors, 39 antidivisors and 343200 totatives.
689804 has a semiprime digit sum 35 in base 10.
689804 = 172452² - 172450² = 852² - 190² is the difference of 2 nonnegative squares in 2 ways.
689804 is the difference of 2 positive pentagonal numbers in 2 ways.
689804 = 2² + 30² + 830² is the sum of 3 positive squares.
689804² = 369396² + 582560² is the sum of 2 positive squares in 1 way.
689804² is the sum of 3 positive squares.
689804 is a divisor of 1667¹¹⁰ - 1.
689804 is palindromic in (at least) base -99.