869086831 has 8 divisors (see below), whose sum is σ = 875477520. Its totient is φ = 862719168.

The previous prime is 869086811. The next prime is 869086853. The reversal of 869086831 is 138680968.

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

It is a cyclic number.

It is not a de Polignac number, because 869086831 - 2⁹ = 869086319 is a prime.

It is a super-2 number, since 2×869086831² = 1510623839635245122, 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 (869086811) 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 7 ways as a sum of consecutive naturals, for example, 73995 + ... + 84931.

It is an arithmetic number, because the mean of its divisors is an integer number (109434690).

Almost surely, 2^869086831 is an apocalyptic number.

869086831 is a deficient number, since it is larger than the sum of its proper divisors (6390689).

869086831 is a wasteful number, since it uses less digits than its factorization.

869086831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11513.

The product of its (nonzero) digits is 497664, while the sum is 49.

The square root of 869086831 is about 29480.2786791441. The cubic root of 869086831 is about 954.3061509817.

It can be divided in two parts, 86908 and 6831, that added together give a palindrome (93739).

The spelling of 869086831 in words is "eight hundred sixty-nine million, eighty-six thousand, eight hundred thirty-one".