189311 has 2 divisors, whose sum is σ = 189312. Its totient is φ = 189310.

The previous prime is 189307. The next prime is 189337. The reversal of 189311 is 113981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 189311 - 2² = 189307 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189361) 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, 94655 + 94656.

It is an arithmetic number, because the mean of its divisors is an integer number (94656).

2¹⁸⁹³¹¹ is an apocalyptic number.

189311 is a deficient number, since it is larger than the sum of its proper divisors (1).

189311 is an equidigital number, since it uses as much as digits as its factorization.

189311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 23.

The square root of 189311 is about 435.0988393457. The cubic root of 189311 is about 57.4193955668.

The spelling of 189311 in words is "one hundred eighty-nine thousand, three hundred eleven".