279887 has 8 divisors (see below), whose sum is σ = 299904. Its totient is φ = 260568.

The previous prime is 279883. The next prime is 279913. The reversal of 279887 is 788972.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 279887 - 2² = 279883 is a prime.

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 279887.

It is not an unprimeable number, because it can be changed into a prime (279883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 848 + ... + 1130.

It is an arithmetic number, because the mean of its divisors is an integer number (37488).

2²⁷⁹⁸⁸⁷ is an apocalyptic number.

279887 is a deficient number, since it is larger than the sum of its proper divisors (20017).

279887 is a wasteful number, since it uses less digits than its factorization.

279887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349.

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

The square root of 279887 is about 529.0434764743. The cubic root of 279887 is about 65.4125242936.

The spelling of 279887 in words is "two hundred seventy-nine thousand, eight hundred eighty-seven".