563793921 has 12 divisors (see below), whose sum is σ = 815278672. Its totient is φ = 375442776.

The previous prime is 563793887. The next prime is 563793929. The reversal of 563793921 is 129397365.

563793921 is a `hidden beast` number, since 5 + 637 + 9 + 3 + 9 + 2 + 1 = 666.

It is not a de Polignac number, because 563793921 - 2¹⁰ = 563792897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (563793929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26371 + ... + 42696.

Almost surely, 2^563793921 is an apocalyptic number.

It is an amenable number.

563793921 is a deficient number, since it is larger than the sum of its proper divisors (251484751).

563793921 is a wasteful number, since it uses less digits than its factorization.

563793921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69980 (or 69977 counting only the distinct ones).

The product of its digits is 306180, while the sum is 45.

The square root of 563793921 is about 23744.3450320282. The cubic root of 563793921 is about 826.1142805530.

The spelling of 563793921 in words is "five hundred sixty-three million, seven hundred ninety-three thousand, nine hundred twenty-one".