189663 has 8 divisors (see below), whose sum is σ = 254976. Its totient is φ = 125400.

The previous prime is 189661. The next prime is 189671. The reversal of 189663 is 366981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 189663 - 2¹ = 189661 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 189663.

It is not an unprimeable number, because it can be changed into a prime (189661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 408 + ... + 738.

It is an arithmetic number, because the mean of its divisors is an integer number (31872).

2¹⁸⁹⁶⁶³ is an apocalyptic number.

189663 is a deficient number, since it is larger than the sum of its proper divisors (65313).

189663 is a wasteful number, since it uses less digits than its factorization.

189663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525.

The product of its digits is 7776, while the sum is 33.

The square root of 189663 is about 435.5031572790. The cubic root of 189663 is about 57.4549615811.

The spelling of 189663 in words is "one hundred eighty-nine thousand, six hundred sixty-three".