189161 has 8 divisors (see below), whose sum is σ = 220224. Its totient is φ = 159120.

The previous prime is 189151. The next prime is 189169. The reversal of 189161 is 161981.

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 189161 - 2¹⁰ = 188137 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 189161.

It is not an unprimeable number, because it can be changed into a prime (189169) 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, 206 + ... + 648.

It is an arithmetic number, because the mean of its divisors is an integer number (27528).

2¹⁸⁹¹⁶¹ is an apocalyptic number.

It is an amenable number.

189161 is a deficient number, since it is larger than the sum of its proper divisors (31063).

189161 is an equidigital number, since it uses as much as digits as its factorization.

189161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511.

The product of its digits is 432, while the sum is 26.

The square root of 189161 is about 434.9264305604. The cubic root of 189161 is about 57.4042261980.

The spelling of 189161 in words is "one hundred eighty-nine thousand, one hundred sixty-one".