563969 has 4 divisors (see below), whose sum is σ = 644544. Its totient is φ = 483396.

The previous prime is 563947. The next prime is 563971. The reversal of 563969 is 969365.

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, and also an emirpimes, since its reverse is a distinct semiprime: 969365 = 5 ⋅193873.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-563969 is a prime.

It is a super-2 number, since 2×563969² = 636122065922, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (563929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40277 + ... + 40290.

It is an arithmetic number, because the mean of its divisors is an integer number (161136).

2⁵⁶³⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

563969 is a deficient number, since it is larger than the sum of its proper divisors (80575).

563969 is an equidigital number, since it uses as much as digits as its factorization.

563969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80574.

The product of its digits is 43740, while the sum is 38.

The square root of 563969 is about 750.9786947710. The cubic root of 563969 is about 82.6199784782.

The spelling of 563969 in words is "five hundred sixty-three thousand, nine hundred sixty-nine".