2168189 has 4 divisors (see below), whose sum is σ = 2218656. Its totient is φ = 2117724.

The previous prime is 2168183. The next prime is 2168219. The reversal of 2168189 is 9818612.

2168189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2168189 - 2⁸ = 2167933 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2168183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25169 + ... + 25254.

It is an arithmetic number, because the mean of its divisors is an integer number (554664).

2^2168189 is an apocalyptic number.

It is an amenable number.

2168189 is a deficient number, since it is larger than the sum of its proper divisors (50467).

2168189 is an equidigital number, since it uses as much as digits as its factorization.

2168189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50466.

The product of its digits is 6912, while the sum is 35.

The square root of 2168189 is about 1472.4771645088. The cubic root of 2168189 is about 129.4292334100.

The spelling of 2168189 in words is "two million, one hundred sixty-eight thousand, one hundred eighty-nine".