86564915 has 4 divisors (see below), whose sum is σ = 103877904. Its totient is φ = 69251928.

The previous prime is 86564911. The next prime is 86564923. The reversal of 86564915 is 51946568.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 86564915 - 2² = 86564911 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86564911) 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 in 3 ways as a sum of consecutive naturals, for example, 8656487 + ... + 8656496.

It is an arithmetic number, because the mean of its divisors is an integer number (25969476).

Almost surely, 2^86564915 is an apocalyptic number.

86564915 is a deficient number, since it is larger than the sum of its proper divisors (17312989).

86564915 is a wasteful number, since it uses less digits than its factorization.

86564915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17312988.

The product of its digits is 259200, while the sum is 44.

The square root of 86564915 is about 9304.0268163844. The cubic root of 86564915 is about 442.3648751662.

The spelling of 86564915 in words is "eighty-six million, five hundred sixty-four thousand, nine hundred fifteen".