328688417 has 2 divisors, whose sum is σ = 328688418. Its totient is φ = 328688416.

The previous prime is 328688401. The next prime is 328688419. The reversal of 328688417 is 714886823.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 181818256 + 146870161 = 13484^2 + 12119^2 .

It is a cyclic number.

It is not a de Polignac number, because 328688417 - 2⁴ = 328688401 is a prime.

Together with 328688419, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (328688419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164344208 + 164344209.

It is an arithmetic number, because the mean of its divisors is an integer number (164344209).

Almost surely, 2^328688417 is an apocalyptic number.

It is an amenable number.

328688417 is a deficient number, since it is larger than the sum of its proper divisors (1).

328688417 is an equidigital number, since it uses as much as digits as its factorization.

328688417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 516096, while the sum is 47.

The square root of 328688417 is about 18129.7660492352. The cubic root of 328688417 is about 690.1255929054.

The spelling of 328688417 in words is "three hundred twenty-eight million, six hundred eighty-eight thousand, four hundred seventeen".