563463721 has 4 divisors (see below), whose sum is σ = 563652292. Its totient is φ = 563275152.

The previous prime is 563463673. The next prime is 563463727. The reversal of 563463721 is 127364365.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 234549225 + 328914496 = 15315^2 + 18136^2 .

It is a cyclic number.

It is not a de Polignac number, because 563463721 - 2⁹ = 563463209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (563463727) 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 in 3 ways as a sum of consecutive naturals, for example, 89730 + ... + 95803.

It is an arithmetic number, because the mean of its divisors is an integer number (140913073).

Almost surely, 2^563463721 is an apocalyptic number.

It is an amenable number.

563463721 is a deficient number, since it is larger than the sum of its proper divisors (188571).

563463721 is a wasteful number, since it uses less digits than its factorization.

563463721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188570.

The product of its digits is 90720, while the sum is 37.

The square root of 563463721 is about 23737.3907791063. The cubic root of 563463721 is about 825.9529708991.

The spelling of 563463721 in words is "five hundred sixty-three million, four hundred sixty-three thousand, seven hundred twenty-one".