263873 has 4 divisors (see below), whose sum is σ = 264960. Its totient is φ = 262788.

The previous prime is 263869. The next prime is 263881. The reversal of 263873 is 378362.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 263873 - 2² = 263869 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263803) 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, 8 + ... + 726.

It is an arithmetic number, because the mean of its divisors is an integer number (66240).

2²⁶³⁸⁷³ is an apocalyptic number.

It is an amenable number.

263873 is a deficient number, since it is larger than the sum of its proper divisors (1087).

263873 is an equidigital number, since it uses as much as digits as its factorization.

263873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086.

The product of its digits is 6048, while the sum is 29.

The square root of 263873 is about 513.6857015725. The cubic root of 263873 is about 64.1403981606.

The spelling of 263873 in words is "two hundred sixty-three thousand, eight hundred seventy-three".