164189 has 4 divisors (see below), whose sum is σ = 165756. Its totient is φ = 162624.

The previous prime is 164183. The next prime is 164191. The reversal of 164189 is 981461.

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

It can be written as a sum of positive squares in 2 ways, for example, as 80089 + 84100 = 283^2 + 290^2 .

It is a cyclic number.

It is not a de Polignac number, because 164189 - 2⁴ = 164173 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 15.

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 164189.

It is not an unprimeable number, because it can be changed into a prime (164183) 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, 614 + ... + 839.

It is an arithmetic number, because the mean of its divisors is an integer number (41439).

2¹⁶⁴¹⁸⁹ is an apocalyptic number.

It is an amenable number.

164189 is a deficient number, since it is larger than the sum of its proper divisors (1567).

164189 is a wasteful number, since it uses less digits than its factorization.

164189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1566.

The product of its digits is 1728, while the sum is 29.

The square root of 164189 is about 405.2024185515. The cubic root of 164189 is about 54.7580557081.

It can be divided in two parts, 164 and 189, that added together give a palindrome (353).

The spelling of 164189 in words is "one hundred sixty-four thousand, one hundred eighty-nine".