287663 has 4 divisors (see below), whose sum is σ = 288840. Its totient is φ = 286488.

The previous prime is 287629. The next prime is 287669. The reversal of 287663 is 366782.

It is a semiprime because it is the product of two primes, 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 287663 - 2¹⁴ = 271279 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 (287669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68 + ... + 761.

It is an arithmetic number, because the mean of its divisors is an integer number (72210).

2²⁸⁷⁶⁶³ is an apocalyptic number.

287663 is a deficient number, since it is larger than the sum of its proper divisors (1177).

287663 is an equidigital number, since it uses as much as digits as its factorization.

287663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1176.

The product of its digits is 12096, while the sum is 32.

The square root of 287663 is about 536.3422414839. The cubic root of 287663 is about 66.0127768346.

The spelling of 287663 in words is "two hundred eighty-seven thousand, six hundred sixty-three".