279668 has 12 divisors (see below), whose sum is σ = 493920. Its totient is φ = 138552.

The previous prime is 279659. The next prime is 279679. The reversal of 279668 is 866972.

It is a nialpdrome in base 6.

It is a congruent number.

It is an unprimeable number.

279668 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305 + ... + 807.

It is an arithmetic number, because the mean of its divisors is an integer number (41160).

2²⁷⁹⁶⁶⁸ is an apocalyptic number.

It is an amenable number.

279668 is a deficient number, since it is larger than the sum of its proper divisors (214252).

279668 is a wasteful number, since it uses less digits than its factorization.

279668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646 (or 644 counting only the distinct ones).

The product of its digits is 36288, while the sum is 38.

The square root of 279668 is about 528.8364586524. The cubic root of 279668 is about 65.3954589770.

The spelling of 279668 in words is "two hundred seventy-nine thousand, six hundred sixty-eight".