563539021 has 2 divisors, whose sum is σ = 563539022. Its totient is φ = 563539020.

The previous prime is 563539019. The next prime is 563539027. The reversal of 563539021 is 120935365.

It is a happy number.

563539021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 544055625 + 19483396 = 23325^2 + 4414^2 .

It is a cyclic number.

It is not a de Polignac number, because 563539021 - 2¹ = 563539019 is a prime.

Together with 563539019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (563539027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 281769510 + 281769511.

It is an arithmetic number, because the mean of its divisors is an integer number (281769511).

Almost surely, 2^563539021 is an apocalyptic number.

It is an amenable number.

563539021 is a deficient number, since it is larger than the sum of its proper divisors (1).

563539021 is an equidigital number, since it uses as much as digits as its factorization.

563539021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24300, while the sum is 34.

The square root of 563539021 is about 23738.9768313632. The cubic root of 563539021 is about 825.9897620808.

The spelling of 563539021 in words is "five hundred sixty-three million, five hundred thirty-nine thousand, twenty-one".