165303309 has 32 divisors (see below), whose sum is σ = 235952640. Its totient is φ = 102779712.

The previous prime is 165303289. The next prime is 165303311. The reversal of 165303309 is 903303561.

It is not a de Polignac number, because 165303309 - 2⁷ = 165303181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165303319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 281314 + ... + 281900.

It is an arithmetic number, because the mean of its divisors is an integer number (7373520).

Almost surely, 2^165303309 is an apocalyptic number.

It is an amenable number.

165303309 is a deficient number, since it is larger than the sum of its proper divisors (70649331).

165303309 is a wasteful number, since it uses less digits than its factorization.

165303309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729.

The product of its (nonzero) digits is 7290, while the sum is 30.

The square root of 165303309 is about 12857.0334447726. The cubic root of 165303309 is about 548.8165285508.

The spelling of 165303309 in words is "one hundred sixty-five million, three hundred three thousand, three hundred nine".