6847439 has 2 divisors, whose sum is σ = 6847440. Its totient is φ = 6847438.

The previous prime is 6847409. The next prime is 6847471. The reversal of 6847439 is 9347486.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6847439 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 6847396 and 6847405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6847409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3423719 + 3423720.

It is an arithmetic number, because the mean of its divisors is an integer number (3423720).

Almost surely, 2^6847439 is an apocalyptic number.

6847439 is a deficient number, since it is larger than the sum of its proper divisors (1).

6847439 is an equidigital number, since it uses as much as digits as its factorization.

6847439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 41.

The square root of 6847439 is about 2616.7611660218. The cubic root of 6847439 is about 189.8931901982.

The spelling of 6847439 in words is "six million, eight hundred forty-seven thousand, four hundred thirty-nine".