6839849 has 2 divisors, whose sum is σ = 6839850. Its totient is φ = 6839848.

The previous prime is 6839843. The next prime is 6839851. The reversal of 6839849 is 9489386.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6786025 + 53824 = 2605^2 + 232^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6839849 is a prime.

Together with 6839851, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6839843) 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, 3419924 + 3419925.

It is an arithmetic number, because the mean of its divisors is an integer number (3419925).

Almost surely, 2^6839849 is an apocalyptic number.

It is an amenable number.

6839849 is a deficient number, since it is larger than the sum of its proper divisors (1).

6839849 is an equidigital number, since it uses as much as digits as its factorization.

6839849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 47.

The square root of 6839849 is about 2615.3104978186. The cubic root of 6839849 is about 189.8230022943.

The spelling of 6839849 in words is "six million, eight hundred thirty-nine thousand, eight hundred forty-nine".