685936523 has 4 divisors (see below), whose sum is σ = 689901648. Its totient is φ = 681971400.

The previous prime is 685936487. The next prime is 685936529. The reversal of 685936523 is 325639586.

685936523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 685936523 - 2⁸ = 685936267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685936529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1982303 + ... + 1982648.

It is an arithmetic number, because the mean of its divisors is an integer number (172475412).

Almost surely, 2^685936523 is an apocalyptic number.

685936523 is a deficient number, since it is larger than the sum of its proper divisors (3965125).

685936523 is a wasteful number, since it uses less digits than its factorization.

685936523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3965124.

The product of its digits is 1166400, while the sum is 47.

The square root of 685936523 is about 26190.3898978232. The cubic root of 685936523 is about 881.9175313634.

The spelling of 685936523 in words is "six hundred eighty-five million, nine hundred thirty-six thousand, five hundred twenty-three".