869726631 has 4 divisors (see below), whose sum is σ = 1159635512. Its totient is φ = 579817752.

The previous prime is 869726621. The next prime is 869726633. The reversal of 869726631 is 136627968.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 869726631 - 2⁷ = 869726503 is a prime.

It is a super-2 number, since 2×869726631² = 1512848825341220322, 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 (869726633) 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, 144954436 + ... + 144954441.

It is an arithmetic number, because the mean of its divisors is an integer number (289908878).

Almost surely, 2^869726631 is an apocalyptic number.

869726631 is a deficient number, since it is larger than the sum of its proper divisors (289908881).

869726631 is a wasteful number, since it uses less digits than its factorization.

869726631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289908880.

The product of its digits is 653184, while the sum is 48.

The square root of 869726631 is about 29491.1280048763. The cubic root of 869726631 is about 954.5402723174.

The spelling of 869726631 in words is "eight hundred sixty-nine million, seven hundred twenty-six thousand, six hundred thirty-one".