3811939 has 2 divisors, whose sum is σ = 3811940. Its totient is φ = 3811938.

The previous prime is 3811921. The next prime is 3811949. The reversal of 3811939 is 9391183.

3811939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (9391183) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3811939 - 2⁹ = 3811427 is a prime.

It is not a weakly prime, because it can be changed into another prime (3811909) 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, 1905969 + 1905970.

It is an arithmetic number, because the mean of its divisors is an integer number (1905970).

Almost surely, 2^3811939 is an apocalyptic number.

3811939 is a deficient number, since it is larger than the sum of its proper divisors (1).

3811939 is an equidigital number, since it uses as much as digits as its factorization.

3811939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832, while the sum is 34.

The square root of 3811939 is about 1952.4187563123. The cubic root of 3811939 is about 156.2123313996.

The spelling of 3811939 in words is "three million, eight hundred eleven thousand, nine hundred thirty-nine".