2162189 has 2 divisors, whose sum is σ = 2162190. Its totient is φ = 2162188.

The previous prime is 2162183. The next prime is 2162191. The reversal of 2162189 is 9812612.

2162189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1729225 + 432964 = 1315^2 + 658^2 .

It is a cyclic number.

It is not a de Polignac number, because 2162189 - 2⁸ = 2161933 is a prime.

It is a super-2 number, since 2×2162189² = 9350122543442, which contains 22 as substring.

Together with 2162191, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2162183) 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 as a sum of consecutive naturals, namely, 1081094 + 1081095.

It is an arithmetic number, because the mean of its divisors is an integer number (1081095).

2^2162189 is an apocalyptic number.

It is an amenable number.

2162189 is a deficient number, since it is larger than the sum of its proper divisors (1).

2162189 is an equidigital number, since it uses as much as digits as its factorization.

2162189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 29.

The square root of 2162189 is about 1470.4383700108. The cubic root of 2162189 is about 129.3097338585.

Subtracting from 2162189 its sum of digits (29), we obtain a triangular number (2162160 = T₂₀₇₉).

The spelling of 2162189 in words is "two million, one hundred sixty-two thousand, one hundred eighty-nine".