287879 has 4 divisors (see below), whose sum is σ = 288960. Its totient is φ = 286800.

The previous prime is 287873. The next prime is 287887. The reversal of 287879 is 978782.

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 287879 - 2⁴ = 287863 is a prime.

It is a d-powerful number, because it can be written as 2¹⁸ + 8⁴ + 8⁴ + 7 + 7⁵ + 9³ .

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 287879.

It is not an unprimeable number, because it can be changed into a prime (287873) 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, 179 + ... + 779.

It is an arithmetic number, because the mean of its divisors is an integer number (72240).

2²⁸⁷⁸⁷⁹ is an apocalyptic number.

287879 is a deficient number, since it is larger than the sum of its proper divisors (1081).

287879 is an equidigital number, since it uses as much as digits as its factorization.

287879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080.

The product of its digits is 56448, while the sum is 41.

The square root of 287879 is about 536.5435676625. The cubic root of 287879 is about 66.0292952287.

The spelling of 287879 in words is "two hundred eighty-seven thousand, eight hundred seventy-nine".