189543 has 16 divisors (see below), whose sum is σ = 274176. Its totient is φ = 116160.

The previous prime is 189529. The next prime is 189547. The reversal of 189543 is 345981.

It is not a de Polignac number, because 189543 - 2⁶ = 189479 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 189543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189547) 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, 2796 + ... + 2862.

It is an arithmetic number, because the mean of its divisors is an integer number (17136).

2¹⁸⁹⁵⁴³ is an apocalyptic number.

189543 is a deficient number, since it is larger than the sum of its proper divisors (84633).

189543 is a wasteful number, since it uses less digits than its factorization.

189543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134.

The product of its digits is 4320, while the sum is 30.

The square root of 189543 is about 435.3653638038. The cubic root of 189543 is about 57.4428417510.

The spelling of 189543 in words is "one hundred eighty-nine thousand, five hundred forty-three".