189271 has 2 divisors, whose sum is σ = 189272. Its totient is φ = 189270.

The previous prime is 189257. The next prime is 189307. The reversal of 189271 is 172981.

It is a weak prime.

It is an emirp because it is prime and its reverse (172981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189271 - 2⁵ = 189239 is a prime.

It is a super-2 number, since 2×189271² = 71647022882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94635 + 94636.

It is an arithmetic number, because the mean of its divisors is an integer number (94636).

2¹⁸⁹²⁷¹ is an apocalyptic number.

189271 is a deficient number, since it is larger than the sum of its proper divisors (1).

189271 is an equidigital number, since it uses as much as digits as its factorization.

189271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 28.

The square root of 189271 is about 435.0528703503. The cubic root of 189271 is about 57.4153511855.

Subtracting from 189271 its reverse (172981), we obtain a triangular number (16290 = T₁₈₀).

The spelling of 189271 in words is "one hundred eighty-nine thousand, two hundred seventy-one".