86409591 has 8 divisors (see below), whose sum is σ = 118023024. Its totient is φ = 56201280.

The previous prime is 86409577. The next prime is 86409607. The reversal of 86409591 is 19590468.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 86409591 - 2⁵ = 86409559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86401591) 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 in 7 ways as a sum of consecutive naturals, for example, 351136 + ... + 351381.

It is an arithmetic number, because the mean of its divisors is an integer number (14752878).

Almost surely, 2^86409591 is an apocalyptic number.

86409591 is a deficient number, since it is larger than the sum of its proper divisors (31613433).

86409591 is a wasteful number, since it uses less digits than its factorization.

86409591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702561.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 86409591 is about 9295.6759302377. The cubic root of 86409591 is about 442.1001373548.

The spelling of 86409591 in words is "eighty-six million, four hundred nine thousand, five hundred ninety-one".