263801 has 4 divisors (see below), whose sum is σ = 265104. Its totient is φ = 262500.

The previous prime is 263761. The next prime is 263803. The reversal of 263801 is 108362.

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 an emirpimes, since its reverse is a distinct semiprime: 108362 = 2 ⋅54181.

It is a cyclic number.

It is not a de Polignac number, because 263801 - 2⁶ = 263737 is a prime.

It is a Duffinian number.

It is a Curzon 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, 275 + ... + 776.

It is an arithmetic number, because the mean of its divisors is an integer number (66276).

2²⁶³⁸⁰¹ is an apocalyptic number.

It is an amenable number.

263801 is a deficient number, since it is larger than the sum of its proper divisors (1303).

263801 is a wasteful number, since it uses less digits than its factorization.

263801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 263801 is about 513.6156150274. The cubic root of 263801 is about 64.1345638782.

The spelling of 263801 in words is "two hundred sixty-three thousand, eight hundred one".