328912165 has 4 divisors (see below), whose sum is σ = 394694604. Its totient is φ = 263129728.

The previous prime is 328912153. The next prime is 328912189. The reversal of 328912165 is 561219823.

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 56761156 + 272151009 = 7534^2 + 16497^2 .

It is a cyclic number.

It is not a de Polignac number, because 328912165 - 2⁷ = 328912037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32891212 + ... + 32891221.

It is an arithmetic number, because the mean of its divisors is an integer number (98673651).

Almost surely, 2^328912165 is an apocalyptic number.

It is an amenable number.

328912165 is a deficient number, since it is larger than the sum of its proper divisors (65782439).

328912165 is an equidigital number, since it uses as much as digits as its factorization.

328912165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65782438.

The product of its digits is 25920, while the sum is 37.

The square root of 328912165 is about 18135.9357354397. The cubic root of 328912165 is about 690.2821537375.

The spelling of 328912165 in words is "three hundred twenty-eight million, nine hundred twelve thousand, one hundred sixty-five".