685907823 has 16 divisors (see below), whose sum is σ = 975974400. Its totient is φ = 426980736.

The previous prime is 685907759. The next prime is 685907843. The reversal of 685907823 is 328709586.

It is not a de Polignac number, because 685907823 - 2⁶ = 685907759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685907843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46473 + ... + 59426.

It is an arithmetic number, because the mean of its divisors is an integer number (60998400).

Almost surely, 2^685907823 is an apocalyptic number.

685907823 is a deficient number, since it is larger than the sum of its proper divisors (290066577).

685907823 is a wasteful number, since it uses less digits than its factorization.

685907823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106046.

The product of its (nonzero) digits is 725760, while the sum is 48.

The square root of 685907823 is about 26189.8419811957. The cubic root of 685907823 is about 881.9052312037.

The spelling of 685907823 in words is "six hundred eighty-five million, nine hundred seven thousand, eight hundred twenty-three".