86423591 has 2 divisors, whose sum is σ = 86423592. Its totient is φ = 86423590.

The previous prime is 86423587. The next prime is 86423621. The reversal of 86423591 is 19532468.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86423591 - 2² = 86423587 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86423521) 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, 43211795 + 43211796.

It is an arithmetic number, because the mean of its divisors is an integer number (43211796).

Almost surely, 2^86423591 is an apocalyptic number.

86423591 is a deficient number, since it is larger than the sum of its proper divisors (1).

86423591 is an equidigital number, since it uses as much as digits as its factorization.

86423591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 38.

The square root of 86423591 is about 9296.4289380385. The cubic root of 86423591 is about 442.1240122805.

The spelling of 86423591 in words is "eighty-six million, four hundred twenty-three thousand, five hundred ninety-one".