328821617 has 2 divisors, whose sum is σ = 328821618. Its totient is φ = 328821616.

The previous prime is 328821611. The next prime is 328821631. The reversal of 328821617 is 716128823.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 323964001 + 4857616 = 17999^2 + 2204^2 .

It is an emirp because it is prime and its reverse (716128823) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-328821617 is a prime.

It is not a weakly prime, because it can be changed into another prime (328821611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164410808 + 164410809.

It is an arithmetic number, because the mean of its divisors is an integer number (164410809).

Almost surely, 2^328821617 is an apocalyptic number.

It is an amenable number.

328821617 is a deficient number, since it is larger than the sum of its proper divisors (1).

328821617 is an equidigital number, since it uses as much as digits as its factorization.

328821617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 38.

The square root of 328821617 is about 18133.4391939312. The cubic root of 328821617 is about 690.2188040942.

The spelling of 328821617 in words is "three hundred twenty-eight million, eight hundred twenty-one thousand, six hundred seventeen".