869388231 has 16 divisors (see below), whose sum is σ = 1201777920. Its totient is φ = 558636480.

The previous prime is 869388229. The next prime is 869388257. The reversal of 869388231 is 132883968.

It is not a de Polignac number, because 869388231 - 2¹ = 869388229 is a prime.

It is a super-2 number, since 2×869388231² = 1511671792402618722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869388271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32371 + ... + 52788.

It is an arithmetic number, because the mean of its divisors is an integer number (75111120).

Almost surely, 2^869388231 is an apocalyptic number.

869388231 is a deficient number, since it is larger than the sum of its proper divisors (332389689).

869388231 is a wasteful number, since it uses less digits than its factorization.

869388231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85286.

The product of its digits is 497664, while the sum is 48.

The square root of 869388231 is about 29485.3901279939. The cubic root of 869388231 is about 954.4164562739.

The spelling of 869388231 in words is "eight hundred sixty-nine million, three hundred eighty-eight thousand, two hundred thirty-one".