189319243 has 4 divisors (see below), whose sum is σ = 193347360. Its totient is φ = 185291128.

The previous prime is 189319223. The next prime is 189319261. The reversal of 189319243 is 342913981.

189319243 is nontrivially palindromic in base 16.

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 189319243 - 2¹⁷ = 189188171 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 189319196 and 189319205.

It is not an unprimeable number, because it can be changed into a prime (189319223) 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, 2013988 + ... + 2014081.

It is an arithmetic number, because the mean of its divisors is an integer number (48336840).

Almost surely, 2^189319243 is an apocalyptic number.

189319243 is a deficient number, since it is larger than the sum of its proper divisors (4028117).

189319243 is an equidigital number, since it uses as much as digits as its factorization.

189319243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4028116.

The product of its digits is 46656, while the sum is 40.

The square root of 189319243 is about 13759.3329416800. The cubic root of 189319243 is about 574.2022894189.

The spelling of 189319243 in words is "one hundred eighty-nine million, three hundred nineteen thousand, two hundred forty-three".