839609 has 2 divisors, whose sum is σ = 839610. Its totient is φ = 839608.

The previous prime is 839603. The next prime is 839611. The reversal of 839609 is 906938.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 765625 + 73984 = 875^2 + 272^2 .

It is a cyclic number.

It is not a de Polignac number, because 839609 - 2⁸ = 839353 is a prime.

Together with 839611, it forms a pair of twin primes.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 839609.

It is not a weakly prime, because it can be changed into another prime (839603) 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, 419804 + 419805.

It is an arithmetic number, because the mean of its divisors is an integer number (419805).

2⁸³⁹⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

839609 is a deficient number, since it is larger than the sum of its proper divisors (1).

839609 is an equidigital number, since it uses as much as digits as its factorization.

839609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 839609 is about 916.3018061752. The cubic root of 839609 is about 94.3392375061.

The spelling of 839609 in words is "eight hundred thirty-nine thousand, six hundred nine".