189043243 has 4 divisors (see below), whose sum is σ = 189071368. Its totient is φ = 189015120.

The previous prime is 189043241. The next prime is 189043271. The reversal of 189043243 is 342340981.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 189043243 - 2¹ = 189043241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 189043199 and 189043208.

It is not an unprimeable number, because it can be changed into a prime (189043241) 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, 2608 + ... + 19618.

It is an arithmetic number, because the mean of its divisors is an integer number (47267842).

Almost surely, 2^189043243 is an apocalyptic number.

189043243 is a deficient number, since it is larger than the sum of its proper divisors (28125).

189043243 is a wasteful number, since it uses less digits than its factorization.

189043243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28124.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 189043243 is about 13749.2997276225. The cubic root of 189043243 is about 573.9231191572.

The spelling of 189043243 in words is "one hundred eighty-nine million, forty-three thousand, two hundred forty-three".