839828939 has 2 divisors, whose sum is σ = 839828940. Its totient is φ = 839828938.

The previous prime is 839828897. The next prime is 839828963. The reversal of 839828939 is 939828938.

839828939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 839828939 - 2¹⁶ = 839763403 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (839828989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419914469 + 419914470.

It is an arithmetic number, because the mean of its divisors is an integer number (419914470).

Almost surely, 2^839828939 is an apocalyptic number.

839828939 is a deficient number, since it is larger than the sum of its proper divisors (1).

839828939 is an equidigital number, since it uses as much as digits as its factorization.

839828939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6718464, while the sum is 59.

The square root of 839828939 is about 28979.8022595048. The cubic root of 839828939 is about 943.4747430286.

Subtracting 839828939 from its reverse (939828938), we obtain a palindrome (99999999).

The spelling of 839828939 in words is "eight hundred thirty-nine million, eight hundred twenty-eight thousand, nine hundred thirty-nine".