189539 has 4 divisors (see below), whose sum is σ = 216624. Its totient is φ = 162456.

The previous prime is 189529. The next prime is 189547. The reversal of 189539 is 935981.

189539 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 935981 = 43 ⋅21767.

It is not a de Polignac number, because 189539 - 2⁴ = 189523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 189499 and 189508.

It is not an unprimeable number, because it can be changed into a prime (189509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13532 + ... + 13545.

It is an arithmetic number, because the mean of its divisors is an integer number (54156).

2¹⁸⁹⁵³⁹ is an apocalyptic number.

189539 is a deficient number, since it is larger than the sum of its proper divisors (27085).

189539 is an equidigital number, since it uses as much as digits as its factorization.

189539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27084.

The product of its digits is 9720, while the sum is 35.

The square root of 189539 is about 435.3607699368. The cubic root of 189539 is about 57.4424376686.

The spelling of 189539 in words is "one hundred eighty-nine thousand, five hundred thirty-nine".