263823 has 16 divisors (see below), whose sum is σ = 426240. Its totient is φ = 141696.

The previous prime is 263821. The next prime is 263827. The reversal of 263823 is 328362.

It is not a de Polignac number, because 263823 - 2¹ = 263821 is a prime.

It is a nialpdrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 263793 and 263802.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 263823.

It is not an unprimeable number, because it can be changed into a prime (263821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13 + ... + 726.

It is an arithmetic number, because the mean of its divisors is an integer number (26640).

2²⁶³⁸²³ is an apocalyptic number.

263823 is a deficient number, since it is larger than the sum of its proper divisors (162417).

263823 is a wasteful number, since it uses less digits than its factorization.

263823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766.

The product of its digits is 1728, while the sum is 24.

The square root of 263823 is about 513.6370313753. The cubic root of 263823 is about 64.1363466882.

The spelling of 263823 in words is "two hundred sixty-three thousand, eight hundred twenty-three".