856803803 has 4 divisors (see below), whose sum is σ = 901898760. Its totient is φ = 811708848.

The previous prime is 856803799. The next prime is 856803821. The reversal of 856803803 is 308308658.

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 856803803 - 2² = 856803799 is a prime.

It is a super-2 number, since 2×856803803² = 1468225513670525618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (856806803) 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, 22547450 + ... + 22547487.

It is an arithmetic number, because the mean of its divisors is an integer number (225474690).

Almost surely, 2^856803803 is an apocalyptic number.

856803803 is a deficient number, since it is larger than the sum of its proper divisors (45094957).

856803803 is a wasteful number, since it uses less digits than its factorization.

856803803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45094956.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 856803803 is about 29271.2111638723. The cubic root of 856803803 is about 949.7889847114.

The spelling of 856803803 in words is "eight hundred fifty-six million, eight hundred three thousand, eight hundred three".