189663563 has 8 divisors (see below), whose sum is σ = 192784800. Its totient is φ = 186556608.

The previous prime is 189663553. The next prime is 189663571. The reversal of 189663563 is 365366981.

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

It is a cyclic number.

It is not a de Polignac number, because 189663563 - 2⁴ = 189663547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189663553) 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 in 7 ways as a sum of consecutive naturals, for example, 25058 + ... + 31736.

It is an arithmetic number, because the mean of its divisors is an integer number (24098100).

Almost surely, 2^189663563 is an apocalyptic number.

189663563 is a deficient number, since it is larger than the sum of its proper divisors (3121237).

189663563 is an equidigital number, since it uses as much as digits as its factorization.

189663563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7141.

The product of its digits is 699840, while the sum is 47.

The square root of 189663563 is about 13771.8394922392. The cubic root of 189663563 is about 574.5501843121.

The spelling of 189663563 in words is "one hundred eighty-nine million, six hundred sixty-three thousand, five hundred sixty-three".