8191952149 has 2 divisors, whose sum is σ = 8191952150. Its totient is φ = 8191952148.

The previous prime is 8191952143. The next prime is 8191952203. The reversal of 8191952149 is 9412591918.

8191952149 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 can be written as a sum of positive squares in only one way, i.e., 4688140900 + 3503811249 = 68470^2 + 59193^2 .

It is a cyclic number.

It is not a de Polignac number, because 8191952149 - 2⁹ = 8191951637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8191952143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4095976074 + 4095976075.

It is an arithmetic number, because the mean of its divisors is an integer number (4095976075).

Almost surely, 2^8191952149 is an apocalyptic number.

It is an amenable number.

8191952149 is a deficient number, since it is larger than the sum of its proper divisors (1).

8191952149 is an equidigital number, since it uses as much as digits as its factorization.

8191952149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 49.

The square root of 8191952149 is about 90509.4036495656. The cubic root of 8191952149 is about 2015.8697547928.

The spelling of 8191952149 in words is "eight billion, one hundred ninety-one million, nine hundred fifty-two thousand, one hundred forty-nine".