189493 has 2 divisors, whose sum is σ = 189494. Its totient is φ = 189492.

The previous prime is 189491. The next prime is 189509. The reversal of 189493 is 394981.

189493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161604 + 27889 = 402^2 + 167^2 .

It is an emirp because it is prime and its reverse (394981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189493 - 2¹ = 189491 is a prime.

Together with 189491, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94746 + 94747.

It is an arithmetic number, because the mean of its divisors is an integer number (94747).

2¹⁸⁹⁴⁹³ is an apocalyptic number.

It is an amenable number.

189493 is a deficient number, since it is larger than the sum of its proper divisors (1).

189493 is an equidigital number, since it uses as much as digits as its factorization.

189493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 34.

The square root of 189493 is about 435.3079369825. The cubic root of 189493 is about 57.4377903121.

The spelling of 189493 in words is "one hundred eighty-nine thousand, four hundred ninety-three".