2065198189 has 4 divisors (see below), whose sum is σ = 2109138624. Its totient is φ = 2021257756.

The previous prime is 2065198183. The next prime is 2065198193. The reversal of 2065198189 is 9818915602.

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 2065198189 - 2⁷ = 2065198061 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2065198183) 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, 21970147 + ... + 21970240.

It is an arithmetic number, because the mean of its divisors is an integer number (527284656).

Almost surely, 2^2065198189 is an apocalyptic number.

It is an amenable number.

2065198189 is a deficient number, since it is larger than the sum of its proper divisors (43940435).

2065198189 is an equidigital number, since it uses as much as digits as its factorization.

2065198189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43940434.

The product of its (nonzero) digits is 311040, while the sum is 49.

The square root of 2065198189 is about 45444.4516855468. The cubic root of 2065198189 is about 1273.4656799763.

The spelling of 2065198189 in words is "two billion, sixty-five million, one hundred ninety-eight thousand, one hundred eighty-nine".