279085 has 4 divisors (see below), whose sum is σ = 334908. Its totient is φ = 223264.

The previous prime is 279073. The next prime is 279109. The reversal of 279085 is 580972.

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

It can be written as a sum of positive squares in 2 ways, for example, as 212521 + 66564 = 461^2 + 258^2 .

It is a cyclic number.

It is not a de Polignac number, because 279085 - 2¹⁵ = 246317 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable 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, 27904 + ... + 27913.

It is an arithmetic number, because the mean of its divisors is an integer number (83727).

2²⁷⁹⁰⁸⁵ is an apocalyptic number.

It is an amenable number.

279085 is a deficient number, since it is larger than the sum of its proper divisors (55823).

279085 is an equidigital number, since it uses as much as digits as its factorization.

279085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55822.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 279085 is about 528.2849609822. The cubic root of 279085 is about 65.3499859213.

The spelling of 279085 in words is "two hundred seventy-nine thousand, eighty-five".