2189941189 has 2 divisors, whose sum is σ = 2189941190. Its totient is φ = 2189941188.

The previous prime is 2189941183. The next prime is 2189941199. The reversal of 2189941189 is 9811499812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2187152289 + 2788900 = 46767^2 + 1670^2 .

It is a cyclic number.

It is not a de Polignac number, because 2189941189 - 2³ = 2189941181 is a prime.

It is a super-2 number, since 2×2189941189² = 9591684822557467442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2189941181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1094970594 + 1094970595.

It is an arithmetic number, because the mean of its divisors is an integer number (1094970595).

Almost surely, 2^2189941189 is an apocalyptic number.

It is an amenable number.

2189941189 is a deficient number, since it is larger than the sum of its proper divisors (1).

2189941189 is an equidigital number, since it uses as much as digits as its factorization.

2189941189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 52.

The square root of 2189941189 is about 46796.8074658945. The cubic root of 2189941189 is about 1298.6062358286.

The spelling of 2189941189 in words is "two billion, one hundred eighty-nine million, nine hundred forty-one thousand, one hundred eighty-nine".