8199191079 has 24 divisors (see below), whose sum is σ = 11972618112. Its totient is φ = 5406747840.

The previous prime is 8199191053. The next prime is 8199191081. The reversal of 8199191079 is 9701919918.

It is a happy number.

It is not a de Polignac number, because 8199191079 - 2²⁹ = 7662320167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8199191089) 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 in 23 ways as a sum of consecutive naturals, for example, 302089 + ... + 328109.

It is an arithmetic number, because the mean of its divisors is an integer number (498859088).

Almost surely, 2^8199191079 is an apocalyptic number.

8199191079 is a deficient number, since it is larger than the sum of its proper divisors (3773427033).

8199191079 is a wasteful number, since it uses less digits than its factorization.

8199191079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26407 (or 26404 counting only the distinct ones).

The product of its (nonzero) digits is 367416, while the sum is 54.

The square root of 8199191079 is about 90549.3847521892. The cubic root of 8199191079 is about 2016.4633635578.

The spelling of 8199191079 in words is "eight billion, one hundred ninety-nine million, one hundred ninety-one thousand, seventy-nine".