3948390791 has 2 divisors, whose sum is σ = 3948390792. Its totient is φ = 3948390790.

The previous prime is 3948390769. The next prime is 3948390829. The reversal of 3948390791 is 1970938493.

It is a happy number.

3948390791 is digitally balanced in base 3, 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 3948390791 - 2¹⁸ = 3948128647 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 (3948390701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1974195395 + 1974195396.

It is an arithmetic number, because the mean of its divisors is an integer number (1974195396).

Almost surely, 2^3948390791 is an apocalyptic number.

3948390791 is a deficient number, since it is larger than the sum of its proper divisors (1).

3948390791 is an equidigital number, since it uses as much as digits as its factorization.

3948390791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1469664, while the sum is 53.

The square root of 3948390791 is about 62836.2219663149. The cubic root of 3948390791 is about 1580.5444354344.

The spelling of 3948390791 in words is "three billion, nine hundred forty-eight million, three hundred ninety thousand, seven hundred ninety-one".