328307989 has 2 divisors, whose sum is σ = 328307990. Its totient is φ = 328307988.

The previous prime is 328307953. The next prime is 328307999. The reversal of 328307989 is 989703823.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 320231025 + 8076964 = 17895^2 + 2842^2 .

It is a cyclic number.

It is not a de Polignac number, because 328307989 - 2¹⁷ = 328176917 is a prime.

It is a super-2 number, since 2×328307989² = 215572271282448242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (328307909) 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 as a sum of consecutive naturals, namely, 164153994 + 164153995.

It is an arithmetic number, because the mean of its divisors is an integer number (164153995).

Almost surely, 2^328307989 is an apocalyptic number.

It is an amenable number.

328307989 is a deficient number, since it is larger than the sum of its proper divisors (1).

328307989 is an equidigital number, since it uses as much as digits as its factorization.

328307989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 653184, while the sum is 49.

The square root of 328307989 is about 18119.2712049906. The cubic root of 328307989 is about 689.8592368461.

The spelling of 328307989 in words is "three hundred twenty-eight million, three hundred seven thousand, nine hundred eighty-nine".