8138320193 has 4 divisors (see below), whose sum is σ = 8144975808. Its totient is φ = 8131664580.

The previous prime is 8138320171. The next prime is 8138320213. The reversal of 8138320193 is 3910238318.

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 8138320193 - 2²⁴ = 8121542977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8138320693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3325973 + ... + 3328418.

It is an arithmetic number, because the mean of its divisors is an integer number (2036243952).

Almost surely, 2^8138320193 is an apocalyptic number.

It is an amenable number.

8138320193 is a deficient number, since it is larger than the sum of its proper divisors (6655615).

8138320193 is a wasteful number, since it uses less digits than its factorization.

8138320193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6655614.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 8138320193 is about 90212.6387653083. The cubic root of 8138320193 is about 2011.4608813982.

The spelling of 8138320193 in words is "eight billion, one hundred thirty-eight million, three hundred twenty thousand, one hundred ninety-three".