189327921 has 8 divisors (see below), whose sum is σ = 261142080. Its totient is φ = 121866192.

The previous prime is 189327911. The next prime is 189327947. The reversal of 189327921 is 129723981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 189327921 - 2⁶ = 189327857 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (189327911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1088005 + ... + 1088178.

It is an arithmetic number, because the mean of its divisors is an integer number (32642760).

Almost surely, 2^189327921 is an apocalyptic number.

It is an amenable number.

189327921 is a deficient number, since it is larger than the sum of its proper divisors (71814159).

189327921 is a wasteful number, since it uses less digits than its factorization.

189327921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2176215.

The product of its digits is 54432, while the sum is 42.

The square root of 189327921 is about 13759.6482876562. The cubic root of 189327921 is about 574.2110626974.

The spelling of 189327921 in words is "one hundred eighty-nine million, three hundred twenty-seven thousand, nine hundred twenty-one".