2186189 has 2 divisors, whose sum is σ = 2186190. Its totient is φ = 2186188.

The previous prime is 2186141. The next prime is 2186203. The reversal of 2186189 is 9816812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1283689 + 902500 = 1133^2 + 950^2 .

It is a cyclic number.

It is not a de Polignac number, because 2186189 - 2¹⁶ = 2120653 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2186389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1093094 + 1093095.

It is an arithmetic number, because the mean of its divisors is an integer number (1093095).

2^2186189 is an apocalyptic number.

It is an amenable number.

2186189 is a deficient number, since it is larger than the sum of its proper divisors (1).

2186189 is an equidigital number, since it uses as much as digits as its factorization.

2186189 is an evil number, because the sum of its binary digits is even.

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

The square root of 2186189 is about 1478.5766804600. The cubic root of 2186189 is about 129.7864145648.

The spelling of 2186189 in words is "two million, one hundred eighty-six thousand, one hundred eighty-nine".