287863 has 2 divisors, whose sum is σ = 287864. Its totient is φ = 287862.

The previous prime is 287857. The next prime is 287867. The reversal of 287863 is 368782.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-287863 is a prime.

It is a plaindrome in base 9.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (287867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143931 + 143932.

It is an arithmetic number, because the mean of its divisors is an integer number (143932).

2²⁸⁷⁸⁶³ is an apocalyptic number.

287863 is a deficient number, since it is larger than the sum of its proper divisors (1).

287863 is an equidigital number, since it uses as much as digits as its factorization.

287863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 34.

The square root of 287863 is about 536.5286572029. The cubic root of 287863 is about 66.0280719274.

The spelling of 287863 in words is "two hundred eighty-seven thousand, eight hundred sixty-three".