165484189 has 4 divisors (see below), whose sum is σ = 178213756. Its totient is φ = 152754624.

The previous prime is 165484181. The next prime is 165484201. The reversal of 165484189 is 981484561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 981484561 = 14011 ⋅70051.

It can be written as a sum of positive squares in 2 ways, for example, as 28196100 + 137288089 = 5310^2 + 11717^2 .

It is a cyclic number.

It is not a de Polignac number, because 165484189 - 2³ = 165484181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165484181) 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, 6364764 + ... + 6364789.

It is an arithmetic number, because the mean of its divisors is an integer number (44553439).

Almost surely, 2^165484189 is an apocalyptic number.

It is an amenable number.

165484189 is a deficient number, since it is larger than the sum of its proper divisors (12729567).

165484189 is a wasteful number, since it uses less digits than its factorization.

165484189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12729566.

The product of its digits is 276480, while the sum is 46.

The square root of 165484189 is about 12864.0658036252. The cubic root of 165484189 is about 549.0166329290.

The spelling of 165484189 in words is "one hundred sixty-five million, four hundred eighty-four thousand, one hundred eighty-nine".