165449329 has 4 divisors (see below), whose sum is σ = 165608100. Its totient is φ = 165290560.

The previous prime is 165449303. The next prime is 165449351. The reversal of 165449329 is 923944561.

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 145154304 + 20295025 = 12048^2 + 4505^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165449329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165449369) 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, 77812 + ... + 79909.

It is an arithmetic number, because the mean of its divisors is an integer number (41402025).

Almost surely, 2^165449329 is an apocalyptic number.

It is an amenable number.

165449329 is a deficient number, since it is larger than the sum of its proper divisors (158771).

165449329 is a wasteful number, since it uses less digits than its factorization.

165449329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158770.

The product of its digits is 233280, while the sum is 43.

The square root of 165449329 is about 12862.7107951629. The cubic root of 165449329 is about 548.9780792683.

The spelling of 165449329 in words is "one hundred sixty-five million, four hundred forty-nine thousand, three hundred twenty-nine".