279247 has 4 divisors (see below), whose sum is σ = 284040. Its totient is φ = 274456.

The previous prime is 279221. The next prime is 279269. The reversal of 279247 is 742972.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 279247 - 2⁷ = 279119 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 not an unprimeable number, because it can be changed into a prime (279047) 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, 2308 + ... + 2425.

It is an arithmetic number, because the mean of its divisors is an integer number (71010).

2²⁷⁹²⁴⁷ is an apocalyptic number.

279247 is a deficient number, since it is larger than the sum of its proper divisors (4793).

279247 is an equidigital number, since it uses as much as digits as its factorization.

279247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4792.

The product of its digits is 7056, while the sum is 31.

The square root of 279247 is about 528.4382650793. The cubic root of 279247 is about 65.3626280076.

The spelling of 279247 in words is "two hundred seventy-nine thousand, two hundred forty-seven".