563993 has 4 divisors (see below), whose sum is σ = 570420. Its totient is φ = 557568.

The previous prime is 563987. The next prime is 563999. The reversal of 563993 is 399365.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 399365 = 5 ⋅79873.

It is an interprime number because it is at equal distance from previous prime (563987) and next prime (563999).

It can be written as a sum of positive squares in 2 ways, for example, as 150544 + 413449 = 388^2 + 643^2 .

It is a cyclic number.

It is not a de Polignac number, because 563993 - 2⁶ = 563929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (563999) 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, 3080 + ... + 3257.

It is an arithmetic number, because the mean of its divisors is an integer number (142605).

2⁵⁶³⁹⁹³ is an apocalyptic number.

It is an amenable number.

563993 is a deficient number, since it is larger than the sum of its proper divisors (6427).

563993 is an equidigital number, since it uses as much as digits as its factorization.

563993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6426.

The product of its digits is 21870, while the sum is 35.

The square root of 563993 is about 750.9946737494. The cubic root of 563993 is about 82.6211504406.

The spelling of 563993 in words is "five hundred sixty-three thousand, nine hundred ninety-three".