563927861 has 4 divisors (see below), whose sum is σ = 644488992. Its totient is φ = 483366732.

The previous prime is 563927857. The next prime is 563927867. The reversal of 563927861 is 168729365.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 563927861 - 2² = 563927857 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (563927867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40280555 + ... + 40280568.

It is an arithmetic number, because the mean of its divisors is an integer number (161122248).

Almost surely, 2^563927861 is an apocalyptic number.

It is an amenable number.

563927861 is a deficient number, since it is larger than the sum of its proper divisors (80561131).

563927861 is an equidigital number, since it uses as much as digits as its factorization.

563927861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80561130.

The product of its digits is 544320, while the sum is 47.

The square root of 563927861 is about 23747.1653255710. The cubic root of 563927861 is about 826.1796951081.

The spelling of 563927861 in words is "five hundred sixty-three million, nine hundred twenty-seven thousand, eight hundred sixty-one".