3981171191 has 2 divisors, whose sum is σ = 3981171192. Its totient is φ = 3981171190.

The previous prime is 3981171167. The next prime is 3981171193. The reversal of 3981171191 is 1911711893.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3981171191 - 2³⁰ = 2907429367 is a prime.

Together with 3981171193, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3981171193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1990585595 + 1990585596.

It is an arithmetic number, because the mean of its divisors is an integer number (1990585596).

Almost surely, 2^3981171191 is an apocalyptic number.

3981171191 is a deficient number, since it is larger than the sum of its proper divisors (1).

3981171191 is an equidigital number, since it uses as much as digits as its factorization.

3981171191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 41.

The square root of 3981171191 is about 63096.5228122755. The cubic root of 3981171191 is about 1584.9063943101.

The spelling of 3981171191 in words is "three billion, nine hundred eighty-one million, one hundred seventy-one thousand, one hundred ninety-one".