189601609 has 2 divisors, whose sum is σ = 189601610. Its totient is φ = 189601608.

The previous prime is 189601597. The next prime is 189601639. The reversal of 189601609 is 906106981.

189601609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 178810384 + 10791225 = 13372^2 + 3285^2 .

It is a cyclic number.

It is not a de Polignac number, because 189601609 - 2¹⁷ = 189470537 is a prime.

It is not a weakly prime, because it can be changed into another prime (189601639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94800804 + 94800805.

It is an arithmetic number, because the mean of its divisors is an integer number (94800805).

Almost surely, 2^189601609 is an apocalyptic number.

It is an amenable number.

189601609 is a deficient number, since it is larger than the sum of its proper divisors (1).

189601609 is an equidigital number, since it uses as much as digits as its factorization.

189601609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 189601609 is about 13769.5900084207. The cubic root of 189601609 is about 574.4876181589.

The spelling of 189601609 in words is "one hundred eighty-nine million, six hundred one thousand, six hundred nine".