856689163 has 8 divisors (see below), whose sum is σ = 954455040. Its totient is φ = 762237480.

The previous prime is 856689161. The next prime is 856689179. The reversal of 856689163 is 361986658.

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 856689163 - 2¹ = 856689161 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 856689163.

It is not an unprimeable number, because it can be changed into a prime (856689161) 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, 828003 + ... + 829036.

It is an arithmetic number, because the mean of its divisors is an integer number (119306880).

Almost surely, 2^856689163 is an apocalyptic number.

856689163 is a deficient number, since it is larger than the sum of its proper divisors (97765877).

856689163 is a wasteful number, since it uses less digits than its factorization.

856689163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1657097.

The product of its digits is 1866240, while the sum is 52.

The square root of 856689163 is about 29269.2528602969. The cubic root of 856689163 is about 949.7466223622.

The spelling of 856689163 in words is "eight hundred fifty-six million, six hundred eighty-nine thousand, one hundred sixty-three".