189633 has 4 divisors (see below), whose sum is σ = 252848. Its totient is φ = 126420.

The previous prime is 189619. The next prime is 189643. The reversal of 189633 is 336981.

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, and also an emirpimes, since its reverse is a distinct semiprime: 336981 = 3 ⋅112327.

It is not a de Polignac number, because 189633 - 2⁴ = 189617 is a prime.

It is a D-number.

It is a Duffinian number.

189633 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 189633.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 189633.

It is not an unprimeable number, because it can be changed into a prime (189613) 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, 31603 + ... + 31608.

It is an arithmetic number, because the mean of its divisors is an integer number (63212).

2¹⁸⁹⁶³³ is an apocalyptic number.

It is an amenable number.

189633 is a deficient number, since it is larger than the sum of its proper divisors (63215).

189633 is an equidigital number, since it uses as much as digits as its factorization.

189633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63214.

The product of its digits is 3888, while the sum is 30.

The square root of 189633 is about 435.4687129978. The cubic root of 189633 is about 57.4519321029.

Subtracting from 189633 its product of digits (3888), we obtain a triangular number (185745 = T₆₀₉).

The spelling of 189633 in words is "one hundred eighty-nine thousand, six hundred thirty-three".