328604989 has 2 divisors, whose sum is σ = 328604990. Its totient is φ = 328604988.

The previous prime is 328604977. The next prime is 328605031. The reversal of 328604989 is 989406823.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 267060964 + 61544025 = 16342^2 + 7845^2 .

It is a cyclic number.

It is not a de Polignac number, because 328604989 - 2¹³ = 328596797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (328604909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164302494 + 164302495.

It is an arithmetic number, because the mean of its divisors is an integer number (164302495).

Almost surely, 2^328604989 is an apocalyptic number.

It is an amenable number.

328604989 is a deficient number, since it is larger than the sum of its proper divisors (1).

328604989 is an equidigital number, since it uses as much as digits as its factorization.

328604989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 746496, while the sum is 49.

The square root of 328604989 is about 18127.4650461668. The cubic root of 328604989 is about 690.0671985243.

The spelling of 328604989 in words is "three hundred twenty-eight million, six hundred four thousand, nine hundred eighty-nine".