328682689 has 2 divisors, whose sum is σ = 328682690. Its totient is φ = 328682688.

The previous prime is 328682671. The next prime is 328682713. The reversal of 328682689 is 986286823.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 268697664 + 59985025 = 16392^2 + 7745^2 .

It is an emirp because it is prime and its reverse (986286823) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 328682689 - 2⁷ = 328682561 is a prime.

It is not a weakly prime, because it can be changed into another prime (328682659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164341344 + 164341345.

It is an arithmetic number, because the mean of its divisors is an integer number (164341345).

Almost surely, 2^328682689 is an apocalyptic number.

It is an amenable number.

328682689 is a deficient number, since it is larger than the sum of its proper divisors (1).

328682689 is an equidigital number, since it uses as much as digits as its factorization.

328682689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1990656, while the sum is 52.

The square root of 328682689 is about 18129.6080762933. The cubic root of 328682689 is about 690.1215839796.

The spelling of 328682689 in words is "three hundred twenty-eight million, six hundred eighty-two thousand, six hundred eighty-nine".