8666939 has 2 divisors, whose sum is σ = 8666940. Its totient is φ = 8666938.

The previous prime is 8666927. The next prime is 8666953. The reversal of 8666939 is 9396668.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8666939 - 2⁸ = 8666683 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8666893 and 8666902.

It is not a weakly prime, because it can be changed into another prime (8666989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4333469 + 4333470.

It is an arithmetic number, because the mean of its divisors is an integer number (4333470).

Almost surely, 2^8666939 is an apocalyptic number.

8666939 is a deficient number, since it is larger than the sum of its proper divisors (1).

8666939 is an equidigital number, since it uses as much as digits as its factorization.

8666939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 419904, while the sum is 47.

The square root of 8666939 is about 2943.9665419294. The cubic root of 8666939 is about 205.4101564196.

The spelling of 8666939 in words is "eight million, six hundred sixty-six thousand, nine hundred thirty-nine".