189445143 has 32 divisors (see below), whose sum is σ = 279558400. Its totient is φ = 113654016.

The previous prime is 189445141. The next prime is 189445153. The reversal of 189445143 is 341544981.

189445143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 189445143 - 2¹ = 189445141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189445141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89643 + ... + 91731.

It is an arithmetic number, because the mean of its divisors is an integer number (8736200).

Almost surely, 2^189445143 is an apocalyptic number.

189445143 is a deficient number, since it is larger than the sum of its proper divisors (90113257).

189445143 is a wasteful number, since it uses less digits than its factorization.

189445143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2191.

The product of its digits is 69120, while the sum is 39.

The square root of 189445143 is about 13763.9072577521. The cubic root of 189445143 is about 574.3295454547.

The spelling of 189445143 in words is "one hundred eighty-nine million, four hundred forty-five thousand, one hundred forty-three".