86431569 has 8 divisors (see below), whose sum is σ = 131705280. Its totient is φ = 49389456.

The previous prime is 86431561. The next prime is 86431577. The reversal of 86431569 is 96513468.

It is an interprime number because it is at equal distance from previous prime (86431561) and next prime (86431577).

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

It is not a de Polignac number, because 86431569 - 2³ = 86431561 is a prime.

It is a super-2 number, since 2×86431569² = 14940832239603522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 86431569.

It is not an unprimeable number, because it can be changed into a prime (86431561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2057874 + ... + 2057915.

It is an arithmetic number, because the mean of its divisors is an integer number (16463160).

Almost surely, 2^86431569 is an apocalyptic number.

It is an amenable number.

86431569 is a deficient number, since it is larger than the sum of its proper divisors (45273711).

86431569 is a wasteful number, since it uses less digits than its factorization.

86431569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4115799.

The product of its digits is 155520, while the sum is 42.

The square root of 86431569 is about 9296.8580176315. The cubic root of 86431569 is about 442.1376164241.

The spelling of 86431569 in words is "eighty-six million, four hundred thirty-one thousand, five hundred sixty-nine".