869323529631 has 4 divisors (see below), whose sum is σ = 1159098039512. Its totient is φ = 579549019752.

The previous prime is 869323529629. The next prime is 869323529651. The reversal of 869323529631 is 136925323968.

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

It is not a de Polignac number, because 869323529631 - 2¹ = 869323529629 is a prime.

It is a super-2 number, since 2×869323529631² (a number of 25 digits) 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 (869323529651) 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, 144887254936 + ... + 144887254941.

It is an arithmetic number, because the mean of its divisors is an integer number (289774509878).

Almost surely, 2^869323529631 is an apocalyptic number.

869323529631 is a deficient number, since it is larger than the sum of its proper divisors (289774509881).

869323529631 is a wasteful number, since it uses less digits than its factorization.

869323529631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289774509880.

The product of its digits is 12597120, while the sum is 57.

The spelling of 869323529631 in words is "eight hundred sixty-nine billion, three hundred twenty-three million, five hundred twenty-nine thousand, six hundred thirty-one".