263871 has 16 divisors (see below), whose sum is σ = 405600. Its totient is φ = 169344.

The previous prime is 263869. The next prime is 263881. The reversal of 263871 is 178362.

It is not a de Polignac number, because 263871 - 2¹ = 263869 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

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, 615 + ... + 951.

It is an arithmetic number, because the mean of its divisors is an integer number (25350).

2²⁶³⁸⁷¹ is an apocalyptic number.

263871 is a deficient number, since it is larger than the sum of its proper divisors (141729).

263871 is a wasteful number, since it uses less digits than its factorization.

263871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375 (or 369 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 263871 is about 513.6837548531. The cubic root of 263871 is about 64.1402361115.

The spelling of 263871 in words is "two hundred sixty-three thousand, eight hundred seventy-one".