563921321 has 2 divisors, whose sum is σ = 563921322. Its totient is φ = 563921320.

The previous prime is 563921317. The next prime is 563921357. The reversal of 563921321 is 123129365.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 321807721 + 242113600 = 17939^2 + 15560^2 .

It is a cyclic number.

It is not a de Polignac number, because 563921321 - 2² = 563921317 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (563921621) 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, 281960660 + 281960661.

It is an arithmetic number, because the mean of its divisors is an integer number (281960661).

Almost surely, 2^563921321 is an apocalyptic number.

It is an amenable number.

563921321 is a deficient number, since it is larger than the sum of its proper divisors (1).

563921321 is an equidigital number, since it uses as much as digits as its factorization.

563921321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 32.

The square root of 563921321 is about 23747.0276245260. The cubic root of 563921321 is about 826.1765012977.

The spelling of 563921321 in words is "five hundred sixty-three million, nine hundred twenty-one thousand, three hundred twenty-one".