328288657 has 2 divisors, whose sum is σ = 328288658. Its totient is φ = 328288656.

The previous prime is 328288651. The next prime is 328288661. The reversal of 328288657 is 756882823.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 216796176 + 111492481 = 14724^2 + 10559^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-328288657 is a prime.

It is a Chen prime.

It is equal to p_17698279 and since 328288657 and 17698279 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 328288657.

It is not a weakly prime, because it can be changed into another prime (328288651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164144328 + 164144329.

It is an arithmetic number, because the mean of its divisors is an integer number (164144329).

Almost surely, 2^328288657 is an apocalyptic number.

It is an amenable number.

328288657 is a deficient number, since it is larger than the sum of its proper divisors (1).

328288657 is an equidigital number, since it uses as much as digits as its factorization.

328288657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1290240, while the sum is 49.

The square root of 328288657 is about 18118.7377319724. The cubic root of 328288657 is about 689.8456960846.

The spelling of 328288657 in words is "three hundred twenty-eight million, two hundred eighty-eight thousand, six hundred fifty-seven".