3911939 has 2 divisors, whose sum is σ = 3911940. Its totient is φ = 3911938.

The previous prime is 3911927. The next prime is 3911977. The reversal of 3911939 is 9391193.

It is a happy number.

3911939 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 not a de Polignac number, because 3911939 - 2⁴ = 3911923 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 3911899 and 3911908.

It is not a weakly prime, because it can be changed into another prime (3911339) 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, 1955969 + 1955970.

It is an arithmetic number, because the mean of its divisors is an integer number (1955970).

Almost surely, 2^3911939 is an apocalyptic number.

3911939 is a deficient number, since it is larger than the sum of its proper divisors (1).

3911939 is an equidigital number, since it uses as much as digits as its factorization.

3911939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6561, while the sum is 35.

The square root of 3911939 is about 1977.8622297824. The cubic root of 3911939 is about 157.5665495198.

The spelling of 3911939 in words is "three million, nine hundred eleven thousand, nine hundred thirty-nine".