165170489 has 4 divisors (see below), whose sum is σ = 180186000. Its totient is φ = 150154980.

The previous prime is 165170483. The next prime is 165170501. The reversal of 165170489 is 984071561.

165170489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 165170489 - 2²⁰ = 164121913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165170483) 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, 7507739 + ... + 7507760.

It is an arithmetic number, because the mean of its divisors is an integer number (45046500).

Almost surely, 2^165170489 is an apocalyptic number.

It is an amenable number.

165170489 is a deficient number, since it is larger than the sum of its proper divisors (15015511).

165170489 is a wasteful number, since it uses less digits than its factorization.

165170489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15015510.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 165170489 is about 12851.8671406142. The cubic root of 165170489 is about 548.6694991423.

The spelling of 165170489 in words is "one hundred sixty-five million, one hundred seventy thousand, four hundred eighty-nine".