8389939 has 2 divisors, whose sum is σ = 8389940. Its totient is φ = 8389938.

The previous prime is 8389937. The next prime is 8389943. The reversal of 8389939 is 9399838.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8389939 - 2¹ = 8389937 is a prime.

Together with 8389937, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 8389892 and 8389901.

It is not a weakly prime, because it can be changed into another prime (8389937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4194969 + 4194970.

It is an arithmetic number, because the mean of its divisors is an integer number (4194970).

Almost surely, 2^8389939 is an apocalyptic number.

8389939 is a deficient number, since it is larger than the sum of its proper divisors (1).

8389939 is an equidigital number, since it uses as much as digits as its factorization.

8389939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 419904, while the sum is 49.

The square root of 8389939 is about 2896.5391418035. The cubic root of 8389939 is about 203.1980804968.

It can be divided in two parts, 83899 and 39, that added together give a palindrome (83938).

The spelling of 8389939 in words is "eight million, three hundred eighty-nine thousand, nine hundred thirty-nine".