86642959 has 4 divisors (see below), whose sum is σ = 93307816. Its totient is φ = 79978104.

The previous prime is 86642947. The next prime is 86642987. The reversal of 86642959 is 95924668.

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 86642959 - 2⁹ = 86642447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86672959) 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, 3332409 + ... + 3332434.

It is an arithmetic number, because the mean of its divisors is an integer number (23326954).

Almost surely, 2^86642959 is an apocalyptic number.

86642959 is a deficient number, since it is larger than the sum of its proper divisors (6664857).

86642959 is a wasteful number, since it uses less digits than its factorization.

86642959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6664856.

The product of its digits is 933120, while the sum is 49.

The square root of 86642959 is about 9308.2199694678. The cubic root of 86642959 is about 442.4977756386.

The spelling of 86642959 in words is "eighty-six million, six hundred forty-two thousand, nine hundred fifty-nine".