563878621 has 2 divisors, whose sum is σ = 563878622. Its totient is φ = 563878620.

The previous prime is 563878619. The next prime is 563878681. The reversal of 563878621 is 126878365.

563878621 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., 557432100 + 6446521 = 23610^2 + 2539^2 .

It is a cyclic number.

It is not a de Polignac number, because 563878621 - 2¹ = 563878619 is a prime.

Together with 563878619, 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 (563878681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 281939310 + 281939311.

It is an arithmetic number, because the mean of its divisors is an integer number (281939311).

Almost surely, 2^563878621 is an apocalyptic number.

It is an amenable number.

563878621 is a deficient number, since it is larger than the sum of its proper divisors (1).

563878621 is an equidigital number, since it uses as much as digits as its factorization.

563878621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 46.

The square root of 563878621 is about 23746.1285476180. The cubic root of 563878621 is about 826.1556481362.

The spelling of 563878621 in words is "five hundred sixty-three million, eight hundred seventy-eight thousand, six hundred twenty-one".