563989 has 4 divisors (see below), whose sum is σ = 565920. Its totient is φ = 562060.

The previous prime is 563987. The next prime is 563999. The reversal of 563989 is 989365.

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 563989 - 2¹ = 563987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (563987) 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, 427 + ... + 1144.

It is an arithmetic number, because the mean of its divisors is an integer number (141480).

2⁵⁶³⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

563989 is a deficient number, since it is larger than the sum of its proper divisors (1931).

563989 is a wasteful number, since it uses less digits than its factorization.

563989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1930.

The product of its digits is 58320, while the sum is 40.

The square root of 563989 is about 750.9920106100. The cubic root of 563989 is about 82.6209551158.

The spelling of 563989 in words is "five hundred sixty-three thousand, nine hundred eighty-nine".