8668687 has 2 divisors, whose sum is σ = 8668688. Its totient is φ = 8668686.

The previous prime is 8668643. The next prime is 8668697. The reversal of 8668687 is 7868668.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8668687 - 2¹⁵ = 8635919 is a prime.

It is a super-2 number, since 2×8668687² = 150292268607938, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8668687.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8668637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4334343 + 4334344.

It is an arithmetic number, because the mean of its divisors is an integer number (4334344).

Almost surely, 2^8668687 is an apocalyptic number.

8668687 is a deficient number, since it is larger than the sum of its proper divisors (1).

8668687 is an equidigital number, since it uses as much as digits as its factorization.

8668687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 774144, while the sum is 49.

The square root of 8668687 is about 2944.2634053359. The cubic root of 8668687 is about 205.4239649402.

The spelling of 8668687 in words is "eight million, six hundred sixty-eight thousand, six hundred eighty-seven".