86539431 has 8 divisors (see below), whose sum is σ = 125875584. Its totient is φ = 52448120.

The previous prime is 86539403. The next prime is 86539447. The reversal of 86539431 is 13493568.

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 86539431 - 2⁵ = 86539399 is a prime.

It is a super-2 number, since 2×86539431² = 14978146235607522, 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 86539431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86535431) 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, 1311171 + ... + 1311236.

It is an arithmetic number, because the mean of its divisors is an integer number (15734448).

Almost surely, 2^86539431 is an apocalyptic number.

86539431 is a deficient number, since it is larger than the sum of its proper divisors (39336153).

86539431 is a wasteful number, since it uses less digits than its factorization.

86539431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2622421.

The product of its digits is 77760, while the sum is 39.

The square root of 86539431 is about 9302.6572010367. The cubic root of 86539431 is about 442.3214613770.

The spelling of 86539431 in words is "eighty-six million, five hundred thirty-nine thousand, four hundred thirty-one".