Number of the day: 686338

Properties of the number 686338:

686338 = 2 × 343169 is semiprime and squarefree.
686338 has 2 distinct prime factors, 4 divisors, 7 antidivisors and 343168 totatives.
686338 has a semiprime digit sum 34 in base 10.
686338 has a Fibonacci digit sum 34 in base 10.
686338 is the difference of 2 positive pentagonal numbers in 2 ways.
686338 = 463² + 687² is the sum of 2 positive squares in 1 way.
686338 = 40² + 183² + 807² is the sum of 3 positive squares.
686338² = 257600² + 636162² is the sum of 2 positive squares in 1 way.
686338² is the sum of 3 positive squares.
686338 is a proper divisor of 997²²⁴ - 1.
686338 is an emirpimes in (at least) the following bases: 2, 5, 11, 12, 16, 17, 22, 23, 24, 33, 34, 35, 41, 42, 47, 50, 55, 61, 64, 65, 68, 70, 76, 81, 91, 92, 94, and 98.
686338 is palindromic in (at least) base 99.