563689 has 4 divisors (see below), whose sum is σ = 644224. Its totient is φ = 483156.

The previous prime is 563663. The next prime is 563723. The reversal of 563689 is 986365.

563689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 986365 = 5 ⋅197273.

It is a cyclic number.

It is not a de Polignac number, because 563689 - 2⁵ = 563657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (563489) 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, 40257 + ... + 40270.

It is an arithmetic number, because the mean of its divisors is an integer number (161056).

2⁵⁶³⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

563689 is a deficient number, since it is larger than the sum of its proper divisors (80535).

563689 is an equidigital number, since it uses as much as digits as its factorization.

563689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80534.

The product of its digits is 38880, while the sum is 37.

The square root of 563689 is about 750.7922482285. The cubic root of 563689 is about 82.6063031263.

The spelling of 563689 in words is "five hundred sixty-three thousand, six hundred eighty-nine".