1009000189 has 2 divisors, whose sum is σ = 1009000190. Its totient is φ = 1009000188.

The previous prime is 1009000177. The next prime is 1009000193. The reversal of 1009000189 is 9810009001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 907997689 + 101002500 = 30133^2 + 10050^2 .

It is a cyclic number.

It is not a de Polignac number, because 1009000189 - 2¹¹ = 1008998141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1009000129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 504500094 + 504500095.

It is an arithmetic number, because the mean of its divisors is an integer number (504500095).

Almost surely, 2^1009000189 is an apocalyptic number.

It is an amenable number.

1009000189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1009000189 is an equidigital number, since it uses as much as digits as its factorization.

1009000189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 1009000189 is about 31764.7633235319. The cubic root of 1009000189 is about 1002.9911073566.

The spelling of 1009000189 in words is "one billion, nine million, one hundred eighty-nine", and thus it is an aban number.