279287 has 4 divisors (see below), whose sum is σ = 280416. Its totient is φ = 278160.

The previous prime is 279269. The next prime is 279311. The reversal of 279287 is 782972.

279287 is nontrivially palindromic in base 6.

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 279287 - 2¹⁶ = 213751 is a prime.

It is a d-powerful number, because it can be written as 2¹⁴ + 7³ + 2¹⁸ + 9 + 8² + 7³ .

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 279287.

It is not an unprimeable number, because it can be changed into a prime (279187) 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, 14 + ... + 747.

It is an arithmetic number, because the mean of its divisors is an integer number (70104).

2²⁷⁹²⁸⁷ is an apocalyptic number.

279287 is a deficient number, since it is larger than the sum of its proper divisors (1129).

279287 is an equidigital number, since it uses as much as digits as its factorization.

279287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128.

The product of its digits is 14112, while the sum is 35.

The square root of 279287 is about 528.4761110968. The cubic root of 279287 is about 65.3657487576.

The spelling of 279287 in words is "two hundred seventy-nine thousand, two hundred eighty-seven".