3420839 has 2 divisors, whose sum is σ = 3420840. Its totient is φ = 3420838.

The previous prime is 3420829. The next prime is 3420871. The reversal of 3420839 is 9380243.

3420839 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3420839 is a prime.

It is a Chen prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3420829) 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, 1710419 + 1710420.

It is an arithmetic number, because the mean of its divisors is an integer number (1710420).

Almost surely, 2^3420839 is an apocalyptic number.

3420839 is a deficient number, since it is larger than the sum of its proper divisors (1).

3420839 is an equidigital number, since it uses as much as digits as its factorization.

3420839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 3420839 is about 1849.5510266008. The cubic root of 3420839 is about 150.6760448083.

The spelling of 3420839 in words is "three million, four hundred twenty thousand, eight hundred thirty-nine".