86591899 has 2 divisors, whose sum is σ = 86591900. Its totient is φ = 86591898.

The previous prime is 86591893. The next prime is 86591909. The reversal of 86591899 is 99819568.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86591899 - 2⁵ = 86591867 is a prime.

It is not a weakly prime, because it can be changed into another prime (86591893) 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, 43295949 + 43295950.

It is an arithmetic number, because the mean of its divisors is an integer number (43295950).

Almost surely, 2^86591899 is an apocalyptic number.

86591899 is a deficient number, since it is larger than the sum of its proper divisors (1).

86591899 is an equidigital number, since it uses as much as digits as its factorization.

86591899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1399680, while the sum is 55.

The square root of 86591899 is about 9305.4768281910. The cubic root of 86591899 is about 442.4108350245.

The spelling of 86591899 in words is "eighty-six million, five hundred ninety-one thousand, eight hundred ninety-nine".