189015223 has 4 divisors (see below), whose sum is σ = 190059688. Its totient is φ = 187970760.

The previous prime is 189015221. The next prime is 189015251. The reversal of 189015223 is 322510981.

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 189015223 - 2¹ = 189015221 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 (189015221) 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 3 ways as a sum of consecutive naturals, for example, 521961 + ... + 522322.

It is an arithmetic number, because the mean of its divisors is an integer number (47514922).

Almost surely, 2^189015223 is an apocalyptic number.

189015223 is a deficient number, since it is larger than the sum of its proper divisors (1044465).

189015223 is a wasteful number, since it uses less digits than its factorization.

189015223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044464.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 189015223 is about 13748.2807288766. The cubic root of 189015223 is about 573.8947621172.

The spelling of 189015223 in words is "one hundred eighty-nine million, fifteen thousand, two hundred twenty-three".