189061109 has 2 divisors, whose sum is σ = 189061110. Its totient is φ = 189061108.

The previous prime is 189061049. The next prime is 189061111. The reversal of 189061109 is 901160981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130462084 + 58599025 = 11422^2 + 7655^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189061109 is a prime.

It is a Sophie Germain prime.

Together with 189061111, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189061129) 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, 94530554 + 94530555.

It is an arithmetic number, because the mean of its divisors is an integer number (94530555).

Almost surely, 2^189061109 is an apocalyptic number.

It is an amenable number.

189061109 is a deficient number, since it is larger than the sum of its proper divisors (1).

189061109 is an equidigital number, since it uses as much as digits as its factorization.

189061109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 35.

The square root of 189061109 is about 13749.9494180888. The cubic root of 189061109 is about 573.9411985964.

The spelling of 189061109 in words is "one hundred eighty-nine million, sixty-one thousand, one hundred nine".