856885523 has 8 divisors (see below), whose sum is σ = 923042400. Its totient is φ = 790763328.

The previous prime is 856885507. The next prime is 856885567. The reversal of 856885523 is 325588658.

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

It is a cyclic number.

It is not a de Polignac number, because 856885523 - 2⁴ = 856885507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (856885573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67463 + ... + 79151.

It is an arithmetic number, because the mean of its divisors is an integer number (115380300).

Almost surely, 2^856885523 is an apocalyptic number.

856885523 is a deficient number, since it is larger than the sum of its proper divisors (66156877).

856885523 is a wasteful number, since it uses less digits than its factorization.

856885523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17341.

The product of its digits is 2304000, while the sum is 50.

The square root of 856885523 is about 29272.6070413962. The cubic root of 856885523 is about 949.8191799899.

The spelling of 856885523 in words is "eight hundred fifty-six million, eight hundred eighty-five thousand, five hundred twenty-three".