3965939 has 2 divisors, whose sum is σ = 3965940. Its totient is φ = 3965938.

The previous prime is 3965911. The next prime is 3965963. The reversal of 3965939 is 9395693.

It is a strong prime.

It is an emirp because it is prime and its reverse (9395693) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3965939 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3965939.

It is not a weakly prime, because it can be changed into another prime (3965639) 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, 1982969 + 1982970.

It is an arithmetic number, because the mean of its divisors is an integer number (1982970).

Almost surely, 2^3965939 is an apocalyptic number.

3965939 is a deficient number, since it is larger than the sum of its proper divisors (1).

3965939 is an equidigital number, since it uses as much as digits as its factorization.

3965939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 196830, while the sum is 44.

The square root of 3965939 is about 1991.4665450366. The cubic root of 3965939 is about 158.2882496449.

The spelling of 3965939 in words is "three million, nine hundred sixty-five thousand, nine hundred thirty-nine".