686424686 has 8 divisors (see below), whose sum is σ = 1029756504. Its totient is φ = 343172520.

The previous prime is 686424679. The next prime is 686424721.

686424686 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11621 + ... + 38831.

It is an arithmetic number, because the mean of its divisors is an integer number (128719563).

Almost surely, 2^686424686 is an apocalyptic number.

686424686 is a deficient number, since it is larger than the sum of its proper divisors (343331818).

686424686 is a wasteful number, since it uses less digits than its factorization.

686424686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39826.

The product of its digits is 2654208, while the sum is 50.

The square root of 686424686 is about 26199.7077464616. The cubic root of 686424686 is about 882.1266942640.

The spelling of 686424686 in words is "six hundred eighty-six million, four hundred twenty-four thousand, six hundred eighty-six".