189665327 has 2 divisors, whose sum is σ = 189665328. Its totient is φ = 189665326.

The previous prime is 189665279. The next prime is 189665369. The reversal of 189665327 is 723566981.

It is a strong prime.

It is an emirp because it is prime and its reverse (723566981) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189665327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189665387) 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 as a sum of consecutive naturals, namely, 94832663 + 94832664.

It is an arithmetic number, because the mean of its divisors is an integer number (94832664).

Almost surely, 2^189665327 is an apocalyptic number.

189665327 is a deficient number, since it is larger than the sum of its proper divisors (1).

189665327 is an equidigital number, since it uses as much as digits as its factorization.

189665327 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 47.

The square root of 189665327 is about 13771.9035358225. The cubic root of 189665327 is about 574.5519655423.

The spelling of 189665327 in words is "one hundred eighty-nine million, six hundred sixty-five thousand, three hundred twenty-seven".