8668613 has 2 divisors, whose sum is σ = 8668614. Its totient is φ = 8668612.

The previous prime is 8668609. The next prime is 8668637. The reversal of 8668613 is 3168668.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8421604 + 247009 = 2902^2 + 497^2 .

It is a cyclic number.

It is not a de Polignac number, because 8668613 - 2² = 8668609 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8668643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4334306 + 4334307.

It is an arithmetic number, because the mean of its divisors is an integer number (4334307).

Almost surely, 2^8668613 is an apocalyptic number.

It is an amenable number.

8668613 is a deficient number, since it is larger than the sum of its proper divisors (1).

8668613 is an equidigital number, since it uses as much as digits as its factorization.

8668613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 38.

The square root of 8668613 is about 2944.2508384986. The cubic root of 8668613 is about 205.4233804066.

Subtracting from 8668613 its reverse (3168668), we obtain a palindrome (5499945).

The spelling of 8668613 in words is "eight million, six hundred sixty-eight thousand, six hundred thirteen".