189609 has 8 divisors (see below), whose sum is σ = 288960. Its totient is φ = 108336.

The previous prime is 189599. The next prime is 189613. The reversal of 189609 is 906981.

It is a happy number.

189609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 189609 - 2⁴ = 189593 is a prime.

189609 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 189609.

It is not an unprimeable number, because it can be changed into a prime (189619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4494 + ... + 4535.

It is an arithmetic number, because the mean of its divisors is an integer number (36120).

2¹⁸⁹⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

189609 is a deficient number, since it is larger than the sum of its proper divisors (99351).

189609 is an equidigital number, since it uses as much as digits as its factorization.

189609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9039.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 189609 is about 435.4411556112. The cubic root of 189609 is about 57.4495082904.

The spelling of 189609 in words is "one hundred eighty-nine thousand, six hundred nine".