86668913 has 4 divisors (see below), whose sum is σ = 86914788. Its totient is φ = 86423040.

The previous prime is 86668909. The next prime is 86668927. The reversal of 86668913 is 31986668.

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

It can be written as a sum of positive squares in 2 ways, for example, as 58874929 + 27793984 = 7673^2 + 5272^2 .

It is a cyclic number.

It is not a de Polignac number, because 86668913 - 2² = 86668909 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86668903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122408 + ... + 123113.

It is an arithmetic number, because the mean of its divisors is an integer number (21728697).

Almost surely, 2^86668913 is an apocalyptic number.

It is an amenable number.

86668913 is a deficient number, since it is larger than the sum of its proper divisors (245875).

86668913 is a wasteful number, since it uses less digits than its factorization.

86668913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245874.

The product of its digits is 373248, while the sum is 47.

The square root of 86668913 is about 9309.6140091843. The cubic root of 86668913 is about 442.5419548035.

The spelling of 86668913 in words is "eighty-six million, six hundred sixty-eight thousand, nine hundred thirteen".