3930191 has 2 divisors, whose sum is σ = 3930192. Its totient is φ = 3930190.

The previous prime is 3930139. The next prime is 3930197. The reversal of 3930191 is 1910393.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3930191 - 2¹⁴ = 3913807 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 3930191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3930197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1965095 + 1965096.

It is an arithmetic number, because the mean of its divisors is an integer number (1965096).

Almost surely, 2^3930191 is an apocalyptic number.

3930191 is a deficient number, since it is larger than the sum of its proper divisors (1).

3930191 is an equidigital number, since it uses as much as digits as its factorization.

3930191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 729, while the sum is 26.

The square root of 3930191 is about 1982.4709329521. The cubic root of 3930191 is about 157.8112230266.

The spelling of 3930191 in words is "three million, nine hundred thirty thousand, one hundred ninety-one".