328061309 has 2 divisors, whose sum is σ = 328061310. Its totient is φ = 328061308.

The previous prime is 328061297. The next prime is 328061329. The reversal of 328061309 is 903160823.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 313644100 + 14417209 = 17710^2 + 3797^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-328061309 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (328061329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164030654 + 164030655.

It is an arithmetic number, because the mean of its divisors is an integer number (164030655).

Almost surely, 2^328061309 is an apocalyptic number.

It is an amenable number.

328061309 is a deficient number, since it is larger than the sum of its proper divisors (1).

328061309 is an equidigital number, since it uses as much as digits as its factorization.

328061309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 328061309 is about 18112.4628087955. The cubic root of 328061309 is about 689.6864142514.

The spelling of 328061309 in words is "three hundred twenty-eight million, sixty-one thousand, three hundred nine".