869631 has 8 divisors (see below), whose sum is σ = 1325184. Its totient is φ = 496920.

The previous prime is 869599. The next prime is 869657. The reversal of 869631 is 136968.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 869631 - 2⁵ = 869599 is a prime.

It is a super-2 number, since 2×869631² = 1512516152322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 869592 and 869601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20685 + ... + 20726.

It is an arithmetic number, because the mean of its divisors is an integer number (165648).

2⁸⁶⁹⁶³¹ is an apocalyptic number.

869631 is a deficient number, since it is larger than the sum of its proper divisors (455553).

869631 is a wasteful number, since it uses less digits than its factorization.

869631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41421.

The product of its digits is 7776, while the sum is 33.

The square root of 869631 is about 932.5400795676. The cubic root of 869631 is about 95.4505285467.

The spelling of 869631 in words is "eight hundred sixty-nine thousand, six hundred thirty-one".