8668637 has 2 divisors, whose sum is σ = 8668638. Its totient is φ = 8668636.

The previous prime is 8668613. The next prime is 8668643. The reversal of 8668637 is 7368668.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8491396 + 177241 = 2914^2 + 421^2 .

It is a cyclic number.

It is not a de Polignac number, because 8668637 - 2⁸ = 8668381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8668687) 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 as a sum of consecutive naturals, namely, 4334318 + 4334319.

It is an arithmetic number, because the mean of its divisors is an integer number (4334319).

Almost surely, 2^8668637 is an apocalyptic number.

It is an amenable number.

8668637 is a deficient number, since it is larger than the sum of its proper divisors (1).

8668637 is an equidigital number, since it uses as much as digits as its factorization.

8668637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 44.

The square root of 8668637 is about 2944.2549142355. The cubic root of 8668637 is about 205.4235699854.

The spelling of 8668637 in words is "eight million, six hundred sixty-eight thousand, six hundred thirty-seven".