189555 has 8 divisors (see below), whose sum is σ = 303312. Its totient is φ = 101088.

The previous prime is 189547. The next prime is 189559. The reversal of 189555 is 555981.

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

It is not a de Polignac number, because 189555 - 2³ = 189547 is a prime.

189555 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (189559) 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, 6304 + ... + 6333.

It is an arithmetic number, because the mean of its divisors is an integer number (37914).

2¹⁸⁹⁵⁵⁵ is an apocalyptic number.

189555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

189555 is a deficient number, since it is larger than the sum of its proper divisors (113757).

189555 is a wasteful number, since it uses less digits than its factorization.

189555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12645.

The product of its digits is 9000, while the sum is 33.

The square root of 189555 is about 435.3791451138. The cubic root of 189555 is about 57.4440539642. Note that the first 3 decimals are identical.

The spelling of 189555 in words is "one hundred eighty-nine thousand, five hundred fifty-five".