1210000189 has 2 divisors, whose sum is σ = 1210000190. Its totient is φ = 1210000188.

The previous prime is 1210000157. The next prime is 1210000219. The reversal of 1210000189 is 9810000121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 667808964 + 542191225 = 25842^2 + 23285^2 .

It is an emirp because it is prime and its reverse (9810000121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1210000189 - 2⁵ = 1210000157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1210000139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605000094 + 605000095.

It is an arithmetic number, because the mean of its divisors is an integer number (605000095).

Almost surely, 2^1210000189 is an apocalyptic number.

It is an amenable number.

1210000189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210000189 is an equidigital number, since it uses as much as digits as its factorization.

1210000189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 1210000189 is about 34785.0569785361. The cubic root of 1210000189 is about 1065.6022922484.

The spelling of 1210000189 in words is "one billion, two hundred ten million, one hundred eighty-nine", and thus it is an aban number.