189143 has 4 divisors (see below), whose sum is σ = 191808. Its totient is φ = 186480.

The previous prime is 189139. The next prime is 189149. The reversal of 189143 is 341981.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 189143 - 2² = 189139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1223 + ... + 1368.

It is an arithmetic number, because the mean of its divisors is an integer number (47952).

2¹⁸⁹¹⁴³ is an apocalyptic number.

189143 is a deficient number, since it is larger than the sum of its proper divisors (2665).

189143 is an equidigital number, since it uses as much as digits as its factorization.

189143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2664.

The product of its digits is 864, while the sum is 26.

The square root of 189143 is about 434.9057369132. The cubic root of 189143 is about 57.4024053349.

The spelling of 189143 in words is "one hundred eighty-nine thousand, one hundred forty-three".