189079109 has 2 divisors, whose sum is σ = 189079110. Its totient is φ = 189079108.

The previous prime is 189079097. The next prime is 189079133. The reversal of 189079109 is 901970981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 175960225 + 13118884 = 13265^2 + 3622^2 .

It is a cyclic number.

It is not a de Polignac number, because 189079109 - 2²⁰ = 188030533 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 189079109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189079169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94539554 + 94539555.

It is an arithmetic number, because the mean of its divisors is an integer number (94539555).

Almost surely, 2^189079109 is an apocalyptic number.

It is an amenable number.

189079109 is a deficient number, since it is larger than the sum of its proper divisors (1).

189079109 is an equidigital number, since it uses as much as digits as its factorization.

189079109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 44.

The square root of 189079109 is about 13750.6039503725. The cubic root of 189079109 is about 573.9594124846.

The spelling of 189079109 in words is "one hundred eighty-nine million, seventy-nine thousand, one hundred nine".