189155 has 4 divisors (see below), whose sum is σ = 226992. Its totient is φ = 151320.

The previous prime is 189151. The next prime is 189169. The reversal of 189155 is 551981.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 189155 - 2² = 189151 is a prime.

It is a super-2 number, since 2×189155² = 71559228050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189151) 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, 18911 + ... + 18920.

It is an arithmetic number, because the mean of its divisors is an integer number (56748).

2¹⁸⁹¹⁵⁵ is an apocalyptic number.

189155 is a deficient number, since it is larger than the sum of its proper divisors (37837).

189155 is an equidigital number, since it uses as much as digits as its factorization.

189155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37836.

The product of its digits is 1800, while the sum is 29.

The square root of 189155 is about 434.9195327874. The cubic root of 189155 is about 57.4036192565.

The spelling of 189155 in words is "one hundred eighty-nine thousand, one hundred fifty-five".