279855 has 20 divisors (see below), whose sum is σ = 502392. Its totient is φ = 149040.

The previous prime is 279847. The next prime is 279857. The reversal of 279855 is 558972.

It is not a de Polignac number, because 279855 - 2³ = 279847 is a prime.

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 279855.

It is not an unprimeable number, because it can be changed into a prime (279857) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 60 + ... + 750.

2²⁷⁹⁸⁵⁵ is an apocalyptic number.

279855 is a deficient number, since it is larger than the sum of its proper divisors (222537).

279855 is an equidigital number, since it uses as much as digits as its factorization.

279855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708 (or 699 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 279855 is about 529.0132323487. The cubic root of 279855 is about 65.4100312868.

It can be divided in two parts, 27 and 9855, that multiplied together give a triangular number (266085 = T₇₂₉).

The spelling of 279855 in words is "two hundred seventy-nine thousand, eight hundred fifty-five".