563839 has 6 divisors (see below), whose sum is σ = 599264. Its totient is φ = 530400.

The previous prime is 563837. The next prime is 563851. The reversal of 563839 is 938365.

It is not a de Polignac number, because 563839 - 2¹ = 563837 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 (563831) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 687 + ... + 1264.

2⁵⁶³⁸³⁹ is an apocalyptic number.

563839 is a deficient number, since it is larger than the sum of its proper divisors (35425).

563839 is a wasteful number, since it uses less digits than its factorization.

563839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1985 (or 1968 counting only the distinct ones).

The product of its digits is 19440, while the sum is 34.

The square root of 563839 is about 750.8921360622. The cubic root of 563839 is about 82.6136297707.

The spelling of 563839 in words is "five hundred sixty-three thousand, eight hundred thirty-nine".