287263 has 4 divisors (see below), whose sum is σ = 290808. Its totient is φ = 283720.

The previous prime is 287257. The next prime is 287269. The reversal of 287263 is 362782.

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

It is an interprime number because it is at equal distance from previous prime (287257) and next prime (287269).

It is a cyclic number.

It is not a de Polignac number, because 287263 - 2⁹ = 286751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287269) 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, 1648 + ... + 1813.

It is an arithmetic number, because the mean of its divisors is an integer number (72702).

2²⁸⁷²⁶³ is an apocalyptic number.

287263 is a deficient number, since it is larger than the sum of its proper divisors (3545).

287263 is an equidigital number, since it uses as much as digits as its factorization.

287263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3544.

The product of its digits is 4032, while the sum is 28.

The square root of 287263 is about 535.9692155339. The cubic root of 287263 is about 65.9821653678.

The spelling of 287263 in words is "two hundred eighty-seven thousand, two hundred sixty-three".