263923 has 4 divisors (see below), whose sum is σ = 287928. Its totient is φ = 239920.

The previous prime is 263911. The next prime is 263927. The reversal of 263923 is 329362.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 263923 - 2⁹ = 263411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263927) 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, 11986 + ... + 12007.

It is an arithmetic number, because the mean of its divisors is an integer number (71982).

2²⁶³⁹²³ is an apocalyptic number.

263923 is a deficient number, since it is larger than the sum of its proper divisors (24005).

263923 is a wasteful number, since it uses less digits than its factorization.

263923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24004.

The product of its digits is 1944, while the sum is 25.

The square root of 263923 is about 513.7343671587. The cubic root of 263923 is about 64.1444491211.

It can be divided in two parts, 2639 and 23, that added together give a palindrome (2662).

The spelling of 263923 in words is "two hundred sixty-three thousand, nine hundred twenty-three".