823563 has 12 divisors (see below), whose sum is σ = 1281280. Its totient is φ = 506736.

The previous prime is 823553. The next prime is 823573. The reversal of 823563 is 365328.

It is an interprime number because it is at equal distance from previous prime (823553) and next prime (823573).

It is not a de Polignac number, because 823563 - 2⁴ = 823547 is a prime.

It is a d-powerful number, because it can be written as 8⁶ + 2⁴ + 5⁶ + 3⁸ + 6⁵ + 3¹² .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 823563.

It is not an unprimeable number, because it can be changed into a prime (823553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3403 + ... + 3636.

2⁸²³⁵⁶³ is an apocalyptic number.

823563 is a deficient number, since it is larger than the sum of its proper divisors (457717).

823563 is a wasteful number, since it uses less digits than its factorization.

823563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7058 (or 7055 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 823563 is about 907.5037190006. The cubic root of 823563 is about 93.7343867332.

The spelling of 823563 in words is "eight hundred twenty-three thousand, five hundred sixty-three".