279899 has 4 divisors (see below), whose sum is σ = 288960. Its totient is φ = 270840.

The previous prime is 279883. The next prime is 279913. The reversal of 279899 is 998972.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 279899 - 2⁴ = 279883 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15 and base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 279899.

It is not an unprimeable number, because it can be changed into a prime (270899) 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, 4484 + ... + 4545.

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

2²⁷⁹⁸⁹⁹ is an apocalyptic number.

279899 is a deficient number, since it is larger than the sum of its proper divisors (9061).

279899 is an equidigital number, since it uses as much as digits as its factorization.

279899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9060.

The product of its digits is 81648, while the sum is 44.

The square root of 279899 is about 529.0548175756. The cubic root of 279899 is about 65.4134591221.

The spelling of 279899 in words is "two hundred seventy-nine thousand, eight hundred ninety-nine".