849839 has 2 divisors, whose sum is σ = 849840. Its totient is φ = 849838.

The previous prime is 849833. The next prime is 849857. The reversal of 849839 is 938948.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-849839 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 849796 and 849805.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 849839.

It is not a weakly prime, because it can be changed into another prime (849833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 424919 + 424920.

It is an arithmetic number, because the mean of its divisors is an integer number (424920).

2⁸⁴⁹⁸³⁹ is an apocalyptic number.

849839 is a deficient number, since it is larger than the sum of its proper divisors (1).

849839 is an equidigital number, since it uses as much as digits as its factorization.

849839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 41.

The square root of 849839 is about 921.8671270850. The cubic root of 849839 is about 94.7208425493.

The spelling of 849839 in words is "eight hundred forty-nine thousand, eight hundred thirty-nine".