279345 has 16 divisors (see below), whose sum is σ = 487872. Its totient is φ = 135360.

The previous prime is 279337. The next prime is 279353. The reversal of 279345 is 543972.

It is an interprime number because it is at equal distance from previous prime (279337) and next prime (279353).

It is not a de Polignac number, because 279345 - 2³ = 279337 is a prime.

279345 is a lucky number.

It is a nialpdrome in base 16.

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 15 ways as a sum of consecutive naturals, for example, 682 + ... + 1011.

It is an arithmetic number, because the mean of its divisors is an integer number (30492).

2²⁷⁹³⁴⁵ is an apocalyptic number.

It is an amenable number.

279345 is a deficient number, since it is larger than the sum of its proper divisors (208527).

279345 is a wasteful number, since it uses less digits than its factorization.

279345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1712.

The product of its digits is 7560, while the sum is 30.

The square root of 279345 is about 528.5309830086. The cubic root of 279345 is about 65.3702733160.

The spelling of 279345 in words is "two hundred seventy-nine thousand, three hundred forty-five".