279439 has 4 divisors (see below), whose sum is σ = 282256. Its totient is φ = 276624.

The previous prime is 279431. The next prime is 279443. The reversal of 279439 is 934972.

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 279439 - 2³ = 279431 is a prime.

It is a Duffinian number.

279439 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (279431) 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, 1254 + ... + 1459.

It is an arithmetic number, because the mean of its divisors is an integer number (70564).

2²⁷⁹⁴³⁹ is an apocalyptic number.

279439 is a deficient number, since it is larger than the sum of its proper divisors (2817).

279439 is a wasteful number, since it uses less digits than its factorization.

279439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2816.

The product of its digits is 13608, while the sum is 34.

The square root of 279439 is about 528.6199012523. The cubic root of 279439 is about 65.3776048912.

The spelling of 279439 in words is "two hundred seventy-nine thousand, four hundred thirty-nine".