86311591 has 2 divisors, whose sum is σ = 86311592. Its totient is φ = 86311590.

The previous prime is 86311583. The next prime is 86311607. The reversal of 86311591 is 19511368.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86311591 - 2³ = 86311583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86311501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43155795 + 43155796.

It is an arithmetic number, because the mean of its divisors is an integer number (43155796).

Almost surely, 2^86311591 is an apocalyptic number.

86311591 is a deficient number, since it is larger than the sum of its proper divisors (1).

86311591 is an equidigital number, since it uses as much as digits as its factorization.

86311591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 34.

The square root of 86311591 is about 9290.4031667092. The cubic root of 86311591 is about 441.9329406259.

The spelling of 86311591 in words is "eighty-six million, three hundred eleven thousand, five hundred ninety-one".