13421839 has 2 divisors, whose sum is σ = 13421840. Its totient is φ = 13421838.

The previous prime is 13421833. The next prime is 13421843. The reversal of 13421839 is 93812431.

It is a strong prime.

It is an emirp because it is prime and its reverse (93812431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13421839 - 2⁷ = 13421711 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13421839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13421833) 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, 6710919 + 6710920.

It is an arithmetic number, because the mean of its divisors is an integer number (6710920).

Almost surely, 2^13421839 is an apocalyptic number.

13421839 is a deficient number, since it is larger than the sum of its proper divisors (1).

13421839 is an equidigital number, since it uses as much as digits as its factorization.

13421839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 31.

The square root of 13421839 is about 3663.5828092183. The cubic root of 13421839 is about 237.6497389984.

The spelling of 13421839 in words is "thirteen million, four hundred twenty-one thousand, eight hundred thirty-nine".