189539189 has 16 divisors (see below), whose sum is σ = 218841600. Its totient is φ = 160804224.

The previous prime is 189539167. The next prime is 189539191. The reversal of 189539189 is 981935981.

189539189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-189539189 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 189539189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189539989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 463217 + ... + 463625.

It is an arithmetic number, because the mean of its divisors is an integer number (13677600).

Almost surely, 2^189539189 is an apocalyptic number.

It is an amenable number.

189539189 is a deficient number, since it is larger than the sum of its proper divisors (29302411).

189539189 is a wasteful number, since it uses less digits than its factorization.

189539189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932.

The product of its digits is 699840, while the sum is 53.

The square root of 189539189 is about 13767.3232329309. The cubic root of 189539189 is about 574.4245676162.

The spelling of 189539189 in words is "one hundred eighty-nine million, five hundred thirty-nine thousand, one hundred eighty-nine".