86329531 has 2 divisors, whose sum is σ = 86329532. Its totient is φ = 86329530.

The previous prime is 86329499. The next prime is 86329589. The reversal of 86329531 is 13592368.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86329531 - 2⁵ = 86329499 is a prime.

It is a super-2 number, since 2×86329531² = 14905575845359922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (86321531) 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 as a sum of consecutive naturals, namely, 43164765 + 43164766.

It is an arithmetic number, because the mean of its divisors is an integer number (43164766).

Almost surely, 2^86329531 is an apocalyptic number.

86329531 is a deficient number, since it is larger than the sum of its proper divisors (1).

86329531 is an equidigital number, since it uses as much as digits as its factorization.

86329531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 37.

The square root of 86329531 is about 9291.3686290019. The cubic root of 86329531 is about 441.9635573238.

The spelling of 86329531 in words is "eighty-six million, three hundred twenty-nine thousand, five hundred thirty-one".