563349981 has 8 divisors (see below), whose sum is σ = 790666720. Its totient is φ = 355799952.

The previous prime is 563349977. The next prime is 563350001. The reversal of 563349981 is 189943365.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 563349981 - 2² = 563349977 is a prime.

It is a super-2 number, since 2×563349981² = 634726402185400722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 563349981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (563349931) 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 7 ways as a sum of consecutive naturals, for example, 4941610 + ... + 4941723.

It is an arithmetic number, because the mean of its divisors is an integer number (98833340).

Almost surely, 2^563349981 is an apocalyptic number.

It is an amenable number.

563349981 is a deficient number, since it is larger than the sum of its proper divisors (227316739).

563349981 is a wasteful number, since it uses less digits than its factorization.

563349981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9883355.

The product of its digits is 699840, while the sum is 48.

The square root of 563349981 is about 23734.9948599110. The cubic root of 563349981 is about 825.8973919214.

The spelling of 563349981 in words is "five hundred sixty-three million, three hundred forty-nine thousand, nine hundred eighty-one".