563985209 has 4 divisors (see below), whose sum is σ = 564394980. Its totient is φ = 563575440.

The previous prime is 563985173. The next prime is 563985211. The reversal of 563985209 is 902589365.

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 89965225 + 474019984 = 9485^2 + 21772^2 .

It is a cyclic number.

It is not a de Polignac number, because 563985209 - 2¹² = 563981113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (563925209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202814 + ... + 205575.

It is an arithmetic number, because the mean of its divisors is an integer number (141098745).

Almost surely, 2^563985209 is an apocalyptic number.

It is an amenable number.

563985209 is a deficient number, since it is larger than the sum of its proper divisors (409771).

563985209 is a wasteful number, since it uses less digits than its factorization.

563985209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409770.

The product of its (nonzero) digits is 583200, while the sum is 47.

The square root of 563985209 is about 23748.3727653075. The cubic root of 563985209 is about 826.2076999591.

The spelling of 563985209 in words is "five hundred sixty-three million, nine hundred eighty-five thousand, two hundred nine".