8191952189 has 4 divisors (see below), whose sum is σ = 8246203680. Its totient is φ = 8137700700.

The previous prime is 8191952149. The next prime is 8191952203. The reversal of 8191952189 is 9812591918.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8191952189 - 2²⁰ = 8190903613 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8191952189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8191952149) 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 in 3 ways as a sum of consecutive naturals, for example, 27125519 + ... + 27125820.

It is an arithmetic number, because the mean of its divisors is an integer number (2061550920).

Almost surely, 2^8191952189 is an apocalyptic number.

It is an amenable number.

8191952189 is a deficient number, since it is larger than the sum of its proper divisors (54251491).

8191952189 is a wasteful number, since it uses less digits than its factorization.

8191952189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54251490.

The product of its digits is 466560, while the sum is 53.

The square root of 8191952189 is about 90509.4038705371. The cubic root of 8191952189 is about 2015.8697580738.

The spelling of 8191952189 in words is "eight billion, one hundred ninety-one million, nine hundred fifty-two thousand, one hundred eighty-nine".