86918513 has 24 divisors (see below), whose sum is σ = 101750016. Its totient is φ = 73504800.

The previous prime is 86918459. The next prime is 86918543. The reversal of 86918513 is 31581968.

It is not a de Polignac number, because 86918513 - 2⁸ = 86918257 is a prime.

It is a Duffinian number.

Its product of digits (51840) is a multiple of the sum of its prime divisors (162).

It is not an unprimeable number, because it can be changed into a prime (86918543) 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 23 ways as a sum of consecutive naturals, for example, 1047170 + ... + 1047252.

It is an arithmetic number, because the mean of its divisors is an integer number (4239584).

Almost surely, 2^86918513 is an apocalyptic number.

86918513 is a gapful number since it is divisible by the number (83) formed by its first and last digit.

It is an amenable number.

86918513 is a deficient number, since it is larger than the sum of its proper divisors (14831503).

86918513 is a wasteful number, since it uses less digits than its factorization.

86918513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245 (or 162 counting only the distinct ones).

The product of its digits is 51840, while the sum is 41.

The square root of 86918513 is about 9323.0098680630. The cubic root of 86918513 is about 442.9663768946.

The spelling of 86918513 in words is "eighty-six million, nine hundred eighteen thousand, five hundred thirteen".