563513921 has 2 divisors, whose sum is σ = 563513922. Its totient is φ = 563513920.

The previous prime is 563513903. The next prime is 563513933. The reversal of 563513921 is 129315365.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 530795521 + 32718400 = 23039^2 + 5720^2 .

It is a cyclic number.

It is not a de Polignac number, because 563513921 - 2²² = 559319617 is a prime.

It is not a weakly prime, because it can be changed into another prime (563513941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 281756960 + 281756961.

It is an arithmetic number, because the mean of its divisors is an integer number (281756961).

Almost surely, 2^563513921 is an apocalyptic number.

It is an amenable number.

563513921 is a deficient number, since it is larger than the sum of its proper divisors (1).

563513921 is an equidigital number, since it uses as much as digits as its factorization.

563513921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24300, while the sum is 35.

The square root of 563513921 is about 23738.4481590520. The cubic root of 563513921 is about 825.9774987177.

The spelling of 563513921 in words is "five hundred sixty-three million, five hundred thirteen thousand, nine hundred twenty-one".