189291 has 4 divisors (see below), whose sum is σ = 252392. Its totient is φ = 126192.

The previous prime is 189271. The next prime is 189307. The reversal of 189291 is 192981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 192981 = 3 ⋅64327.

It is not a de Polignac number, because 189291 - 2⁹ = 188779 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a 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 in 3 ways as a sum of consecutive naturals, for example, 31546 + ... + 31551.

It is an arithmetic number, because the mean of its divisors is an integer number (63098).

2¹⁸⁹²⁹¹ is an apocalyptic number.

189291 is a deficient number, since it is larger than the sum of its proper divisors (63101).

189291 is an equidigital number, since it uses as much as digits as its factorization.

189291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63100.

The product of its digits is 1296, while the sum is 30.

The square root of 189291 is about 435.0758554551. The cubic root of 189291 is about 57.4173734474.

The spelling of 189291 in words is "one hundred eighty-nine thousand, two hundred ninety-one".