86580931 has 2 divisors, whose sum is σ = 86580932. Its totient is φ = 86580930.

The previous prime is 86580917. The next prime is 86580961. The reversal of 86580931 is 13908568.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86580931 - 2⁷ = 86580803 is a prime.

It is a super-2 number, since 2×86580931² = 14992515225653522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (86580961) 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, 43290465 + 43290466.

It is an arithmetic number, because the mean of its divisors is an integer number (43290466).

Almost surely, 2^86580931 is an apocalyptic number.

86580931 is a deficient number, since it is larger than the sum of its proper divisors (1).

86580931 is an equidigital number, since it uses as much as digits as its factorization.

86580931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 86580931 is about 9304.8874791692. The cubic root of 86580931 is about 442.3921551904.

It can be divided in two parts, 865 and 80931, that added together give a square (81796 = 286²).

The spelling of 86580931 in words is "eighty-six million, five hundred eighty thousand, nine hundred thirty-one".