328825681 has 2 divisors, whose sum is σ = 328825682. Its totient is φ = 328825680.

The previous prime is 328825663. The next prime is 328825741. The reversal of 328825681 is 186528823.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 317374225 + 11451456 = 17815^2 + 3384^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-328825681 is a prime.

It is a super-2 number, since 2×328825681² = 216252656970227522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (328823681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164412840 + 164412841.

It is an arithmetic number, because the mean of its divisors is an integer number (164412841).

Almost surely, 2^328825681 is an apocalyptic number.

It is an amenable number.

328825681 is a deficient number, since it is larger than the sum of its proper divisors (1).

328825681 is an equidigital number, since it uses as much as digits as its factorization.

328825681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 184320, while the sum is 43.

The square root of 328825681 is about 18133.5512517543. The cubic root of 328825681 is about 690.2216476194.

The spelling of 328825681 in words is "three hundred twenty-eight million, eight hundred twenty-five thousand, six hundred eighty-one".