263243 has 4 divisors (see below), whose sum is σ = 267240. Its totient is φ = 259248.

The previous prime is 263239. The next prime is 263257. The reversal of 263243 is 342362.

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 263243 - 2² = 263239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263213) 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, 1898 + ... + 2031.

It is an arithmetic number, because the mean of its divisors is an integer number (66810).

2²⁶³²⁴³ is an apocalyptic number.

263243 is a deficient number, since it is larger than the sum of its proper divisors (3997).

263243 is an equidigital number, since it uses as much as digits as its factorization.

263243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3996.

The product of its digits is 864, while the sum is 20.

The square root of 263243 is about 513.0721196869. The cubic root of 263243 is about 64.0893121557.

The spelling of 263243 in words is "two hundred sixty-three thousand, two hundred forty-three".