328418609 has 4 divisors (see below), whose sum is σ = 328511604. Its totient is φ = 328325616.

The previous prime is 328418593. The next prime is 328418627. The reversal of 328418609 is 906814823.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 906814823 = 1873 ⋅484151.

It can be written as a sum of positive squares in 2 ways, for example, as 202350625 + 126067984 = 14225^2 + 11228^2 .

It is a cyclic number.

It is not a de Polignac number, because 328418609 - 2⁴ = 328418593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (328418669) 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 3 ways as a sum of consecutive naturals, for example, 40982 + ... + 48335.

It is an arithmetic number, because the mean of its divisors is an integer number (82127901).

Almost surely, 2^328418609 is an apocalyptic number.

It is an amenable number.

328418609 is a deficient number, since it is larger than the sum of its proper divisors (92995).

328418609 is an equidigital number, since it uses as much as digits as its factorization.

328418609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92994.

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 328418609 is about 18122.3234989336. The cubic root of 328418609 is about 689.9367084704.

The spelling of 328418609 in words is "three hundred twenty-eight million, four hundred eighteen thousand, six hundred nine".