11943839 has 2 divisors, whose sum is σ = 11943840. Its totient is φ = 11943838.

The previous prime is 11943829. The next prime is 11943851. The reversal of 11943839 is 93834911.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (93834911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11943839 - 2⁴ = 11943823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11943829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5971919 + 5971920.

It is an arithmetic number, because the mean of its divisors is an integer number (5971920).

Almost surely, 2^11943839 is an apocalyptic number.

11943839 is a deficient number, since it is larger than the sum of its proper divisors (1).

11943839 is an equidigital number, since it uses as much as digits as its factorization.

11943839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 38.

The square root of 11943839 is about 3455.9859664067. The cubic root of 11943839 is about 228.5851326791.

The spelling of 11943839 in words is "eleven million, nine hundred forty-three thousand, eight hundred thirty-nine".