3975239 has 2 divisors, whose sum is σ = 3975240. Its totient is φ = 3975238.

The previous prime is 3975217. The next prime is 3975247. The reversal of 3975239 is 9325793.

3975239 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 (9325793) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3975239 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3975269) 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, 1987619 + 1987620.

It is an arithmetic number, because the mean of its divisors is an integer number (1987620).

Almost surely, 2^3975239 is an apocalyptic number.

3975239 is a deficient number, since it is larger than the sum of its proper divisors (1).

3975239 is an equidigital number, since it uses as much as digits as its factorization.

3975239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51030, while the sum is 38.

The square root of 3975239 is about 1993.8001404353. The cubic root of 3975239 is about 158.4118800182.

The spelling of 3975239 in words is "three million, nine hundred seventy-five thousand, two hundred thirty-nine".