189453609 has 6 divisors (see below), whose sum is σ = 273655226. Its totient is φ = 126302400.

The previous prime is 189453587. The next prime is 189453611. The reversal of 189453609 is 906354981.

It is a happy number.

189453609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 135210384 + 54243225 = 11628^2 + 7365^2 .

It is not a de Polignac number, because 189453609 - 2⁵ = 189453577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189453619) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10525192 + ... + 10525209.

Almost surely, 2^189453609 is an apocalyptic number.

It is an amenable number.

189453609 is a deficient number, since it is larger than the sum of its proper divisors (84201617).

189453609 is a wasteful number, since it uses less digits than its factorization.

189453609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21050407 (or 21050404 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 189453609 is about 13764.2147978009. The cubic root of 189453609 is about 574.3381006164.

The spelling of 189453609 in words is "one hundred eighty-nine million, four hundred fifty-three thousand, six hundred nine".