189323171 has 2 divisors, whose sum is σ = 189323172. Its totient is φ = 189323170.

The previous prime is 189323149. The next prime is 189323179. The reversal of 189323171 is 171323981.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (171323981) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189323171 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (189323179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94661585 + 94661586.

It is an arithmetic number, because the mean of its divisors is an integer number (94661586).

Almost surely, 2^189323171 is an apocalyptic number.

189323171 is a deficient number, since it is larger than the sum of its proper divisors (1).

189323171 is an equidigital number, since it uses as much as digits as its factorization.

189323171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 35.

The square root of 189323171 is about 13759.4756804175. The cubic root of 189323171 is about 574.2062605789.

The spelling of 189323171 in words is "one hundred eighty-nine million, three hundred twenty-three thousand, one hundred seventy-one".