321930617 has 2 divisors, whose sum is σ = 321930618. Its totient is φ = 321930616.

The previous prime is 321930593. The next prime is 321930643. The reversal of 321930617 is 716039123.

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., 241989136 + 79941481 = 15556^2 + 8941^2 .

It is an emirp because it is prime and its reverse (716039123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 321930617 - 2⁸ = 321930361 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (321930677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160965308 + 160965309.

It is an arithmetic number, because the mean of its divisors is an integer number (160965309).

Almost surely, 2^321930617 is an apocalyptic number.

It is an amenable number.

321930617 is a deficient number, since it is larger than the sum of its proper divisors (1).

321930617 is an equidigital number, since it uses as much as digits as its factorization.

321930617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 321930617 is about 17942.4250590604. The cubic root of 321930617 is about 685.3631668658.

The spelling of 321930617 in words is "three hundred twenty-one million, nine hundred thirty thousand, six hundred seventeen".