563639 has 4 divisors (see below), whose sum is σ = 568920. Its totient is φ = 558360.

The previous prime is 563623. The next prime is 563657. The reversal of 563639 is 936365.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 936365 = 5 ⋅187273.

It is a cyclic number.

It is not a de Polignac number, because 563639 - 2⁴ = 563623 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 (563039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2477 + ... + 2694.

It is an arithmetic number, because the mean of its divisors is an integer number (142230).

2⁵⁶³⁶³⁹ is an apocalyptic number.

563639 is a deficient number, since it is larger than the sum of its proper divisors (5281).

563639 is a wasteful number, since it uses less digits than its factorization.

563639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5280.

The product of its digits is 14580, while the sum is 32.

The square root of 563639 is about 750.7589493306. The cubic root of 563639 is about 82.6038606227.

The spelling of 563639 in words is "five hundred sixty-three thousand, six hundred thirty-nine".