8669939 has 2 divisors, whose sum is σ = 8669940. Its totient is φ = 8669938.

The previous prime is 8669929. The next prime is 8669963. The reversal of 8669939 is 9399668.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8669939 - 2⁴ = 8669923 is a prime.

It is not a weakly prime, because it can be changed into another prime (8669929) 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, 4334969 + 4334970.

It is an arithmetic number, because the mean of its divisors is an integer number (4334970).

Almost surely, 2^8669939 is an apocalyptic number.

8669939 is a deficient number, since it is larger than the sum of its proper divisors (1).

8669939 is an equidigital number, since it uses as much as digits as its factorization.

8669939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 629856, while the sum is 50.

The square root of 8669939 is about 2944.4760145058. The cubic root of 8669939 is about 205.4338541127.

The spelling of 8669939 in words is "eight million, six hundred sixty-nine thousand, nine hundred thirty-nine".