279849 has 4 divisors (see below), whose sum is σ = 373136. Its totient is φ = 186564.

The previous prime is 279847. The next prime is 279857. The reversal of 279849 is 948972.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 279849 - 2¹ = 279847 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a nialpdrome in base 6.

It is a zygodrome in base 6.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 279849.

It is not an unprimeable number, because it can be changed into a prime (279847) by changing a digit.

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, 46639 + ... + 46644.

It is an arithmetic number, because the mean of its divisors is an integer number (93284).

279849 is a Friedman number, since it can be written as 8+(9+9+7-2)^4, using all its digits and the basic arithmetic operations.

2²⁷⁹⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

279849 is a deficient number, since it is larger than the sum of its proper divisors (93287).

279849 is an equidigital number, since it uses as much as digits as its factorization.

279849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93286.

The product of its digits is 36288, while the sum is 39.

The square root of 279849 is about 529.0075613826. The cubic root of 279849 is about 65.4095638269.

It can be divided in two parts, 279 and 849, that added together give a triangular number (1128 = T₄₇).

The spelling of 279849 in words is "two hundred seventy-nine thousand, eight hundred forty-nine".