3964339391 has 2 divisors, whose sum is σ = 3964339392. Its totient is φ = 3964339390.

The previous prime is 3964339339. The next prime is 3964339399. The reversal of 3964339391 is 1939334693.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3964339391 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3964339399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1982169695 + 1982169696.

It is an arithmetic number, because the mean of its divisors is an integer number (1982169696).

Almost surely, 2^3964339391 is an apocalyptic number.

3964339391 is a deficient number, since it is larger than the sum of its proper divisors (1).

3964339391 is an equidigital number, since it uses as much as digits as its factorization.

3964339391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1417176, while the sum is 50.

The square root of 3964339391 is about 62963.0001747058. Note that the first 3 decimals coincide. The cubic root of 3964339391 is about 1582.6696562633.

The spelling of 3964339391 in words is "three billion, nine hundred sixty-four million, three hundred thirty-nine thousand, three hundred ninety-one".