3405839 has 2 divisors, whose sum is σ = 3405840. Its totient is φ = 3405838.

The previous prime is 3405827. The next prime is 3405841. The reversal of 3405839 is 9385043.

It is a strong prime.

It is an emirp because it is prime and its reverse (9385043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3405839 - 2⁴ = 3405823 is a prime.

Together with 3405841, it forms a pair of twin primes.

It is a Chen prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3405889) 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, 1702919 + 1702920.

It is an arithmetic number, because the mean of its divisors is an integer number (1702920).

Almost surely, 2^3405839 is an apocalyptic number.

3405839 is a deficient number, since it is larger than the sum of its proper divisors (1).

3405839 is an equidigital number, since it uses as much as digits as its factorization.

3405839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 3405839 is about 1845.4915334403. The cubic root of 3405839 is about 150.4554895359.

The spelling of 3405839 in words is "three million, four hundred five thousand, eight hundred thirty-nine".