189393 has 4 divisors (see below), whose sum is σ = 252528. Its totient is φ = 126260.

The previous prime is 189391. The next prime is 189401. The reversal of 189393 is 393981.

189393 is nontrivially palindromic in base 15.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 189393 - 2¹ = 189391 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (189391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31563 + ... + 31568.

It is an arithmetic number, because the mean of its divisors is an integer number (63132).

2¹⁸⁹³⁹³ is an apocalyptic number.

It is an amenable number.

189393 is a deficient number, since it is larger than the sum of its proper divisors (63135).

189393 is an equidigital number, since it uses as much as digits as its factorization.

189393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63134.

The product of its digits is 5832, while the sum is 33.

The square root of 189393 is about 435.1930606064. The cubic root of 189393 is about 57.4276847678.

The spelling of 189393 in words is "one hundred eighty-nine thousand, three hundred ninety-three".