685590913 has 8 divisors (see below), whose sum is σ = 785602880. Its totient is φ = 586096560.

The previous prime is 685590883. The next prime is 685590937. The reversal of 685590913 is 319095586.

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

It is a de Polignac number, because none of the positive numbers 2^k-685590913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685590953) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 126558 + ... + 131863.

It is an arithmetic number, because the mean of its divisors is an integer number (98200360).

Almost surely, 2^685590913 is an apocalyptic number.

It is an amenable number.

685590913 is a deficient number, since it is larger than the sum of its proper divisors (100011967).

685590913 is a wasteful number, since it uses less digits than its factorization.

685590913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258807.

The product of its (nonzero) digits is 291600, while the sum is 46.

The square root of 685590913 is about 26183.7910356770. The cubic root of 685590913 is about 881.7693880521.

The spelling of 685590913 in words is "six hundred eighty-five million, five hundred ninety thousand, nine hundred thirteen".