3976391 has 2 divisors, whose sum is σ = 3976392. Its totient is φ = 3976390.

The previous prime is 3976387. The next prime is 3976397. The reversal of 3976391 is 1936793.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3976391 - 2² = 3976387 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 (3976397) 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, 1988195 + 1988196.

It is an arithmetic number, because the mean of its divisors is an integer number (1988196).

Almost surely, 2^3976391 is an apocalyptic number.

3976391 is a deficient number, since it is larger than the sum of its proper divisors (1).

3976391 is an equidigital number, since it uses as much as digits as its factorization.

3976391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30618, while the sum is 38.

The square root of 3976391 is about 1994.0890150643. The cubic root of 3976391 is about 158.4271808056.

The spelling of 3976391 in words is "three million, nine hundred seventy-six thousand, three hundred ninety-one".