189887227 has 4 divisors (see below), whose sum is σ = 189915640. Its totient is φ = 189858816.

The previous prime is 189887209. The next prime is 189887233. The reversal of 189887227 is 722788981.

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 189887227 - 2²³ = 181498619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189887237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1924 + ... + 19582.

It is an arithmetic number, because the mean of its divisors is an integer number (47478910).

Almost surely, 2^189887227 is an apocalyptic number.

189887227 is a deficient number, since it is larger than the sum of its proper divisors (28413).

189887227 is a wasteful number, since it uses less digits than its factorization.

189887227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28412.

The product of its digits is 903168, while the sum is 52.

The square root of 189887227 is about 13779.9574382507. The cubic root of 189887227 is about 574.7759449680.

The spelling of 189887227 in words is "one hundred eighty-nine million, eight hundred eighty-seven thousand, two hundred twenty-seven".