279959 has 4 divisors (see below), whose sum is σ = 283416. Its totient is φ = 276504.

The previous prime is 279949. The next prime is 279967. The reversal of 279959 is 959972.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-279959 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 279959.

It is not an unprimeable number, because it can be changed into a prime (279919) 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, 1604 + ... + 1769.

It is an arithmetic number, because the mean of its divisors is an integer number (70854).

2²⁷⁹⁹⁵⁹ is an apocalyptic number.

279959 is a deficient number, since it is larger than the sum of its proper divisors (3457).

279959 is an equidigital number, since it uses as much as digits as its factorization.

279959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3456.

The product of its digits is 51030, while the sum is 41.

The square root of 279959 is about 529.1115194361. Note that the first 3 decimals coincide. The cubic root of 279959 is about 65.4181328641.

The spelling of 279959 in words is "two hundred seventy-nine thousand, nine hundred fifty-nine".