165489313 has 4 divisors (see below), whose sum is σ = 180533808. Its totient is φ = 150444820.

The previous prime is 165489293. The next prime is 165489349. The reversal of 165489313 is 313984561.

165489313 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 165489313 - 2⁵ = 165489281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165489113) 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, 7522231 + ... + 7522252.

It is an arithmetic number, because the mean of its divisors is an integer number (45133452).

Almost surely, 2^165489313 is an apocalyptic number.

It is an amenable number.

165489313 is a deficient number, since it is larger than the sum of its proper divisors (15044495).

165489313 is a wasteful number, since it uses less digits than its factorization.

165489313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15044494.

The product of its digits is 77760, while the sum is 40.

The square root of 165489313 is about 12864.2649615126. The cubic root of 165489313 is about 549.0222993963.

The spelling of 165489313 in words is "one hundred sixty-five million, four hundred eighty-nine thousand, three hundred thirteen".