859872631 has 4 divisors (see below), whose sum is σ = 910453392. Its totient is φ = 809291872.

The previous prime is 859872589. The next prime is 859872659. The reversal of 859872631 is 136278958.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 136278958 = 2 ⋅68139479.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-859872631 is a prime.

It is a super-2 number, since 2×859872631² = 1478761883085724322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (859872331) 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, 25290355 + ... + 25290388.

It is an arithmetic number, because the mean of its divisors is an integer number (227613348).

Almost surely, 2^859872631 is an apocalyptic number.

859872631 is a deficient number, since it is larger than the sum of its proper divisors (50580761).

859872631 is a wasteful number, since it uses less digits than its factorization.

859872631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50580760.

The product of its digits is 725760, while the sum is 49.

The square root of 859872631 is about 29323.5848933926. The cubic root of 859872631 is about 950.9215917352.

The spelling of 859872631 in words is "eight hundred fifty-nine million, eight hundred seventy-two thousand, six hundred thirty-one".