856529863 has 4 divisors (see below), whose sum is σ = 978891280. Its totient is φ = 734168448.

The previous prime is 856529851. The next prime is 856529881. The reversal of 856529863 is 368925658.

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 856529863 - 2⁹ = 856529351 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 856529863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856529803) 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 3 ways as a sum of consecutive naturals, for example, 61180698 + ... + 61180711.

It is an arithmetic number, because the mean of its divisors is an integer number (244722820).

Almost surely, 2^856529863 is an apocalyptic number.

856529863 is a deficient number, since it is larger than the sum of its proper divisors (122361417).

856529863 is a wasteful number, since it uses less digits than its factorization.

856529863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122361416.

The product of its digits is 3110400, while the sum is 52.

The square root of 856529863 is about 29266.5314480551. The cubic root of 856529863 is about 949.6877507504.

The spelling of 856529863 in words is "eight hundred fifty-six million, five hundred twenty-nine thousand, eight hundred sixty-three".