328308209 has 4 divisors (see below), whose sum is σ = 328713840. Its totient is φ = 327902580.

The previous prime is 328308203. The next prime is 328308221. The reversal of 328308209 is 902803823.

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 328308209 - 2⁸ = 328307953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (328308203) 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, 201599 + ... + 203220.

It is an arithmetic number, because the mean of its divisors is an integer number (82178460).

Almost surely, 2^328308209 is an apocalyptic number.

It is an amenable number.

328308209 is a deficient number, since it is larger than the sum of its proper divisors (405631).

328308209 is an equidigital number, since it uses as much as digits as its factorization.

328308209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405630.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 328308209 is about 18119.2772758739. The cubic root of 328308209 is about 689.8593909382.

The spelling of 328308209 in words is "three hundred twenty-eight million, three hundred eight thousand, two hundred nine".