279563 has 4 divisors (see below), whose sum is σ = 284208. Its totient is φ = 274920.

The previous prime is 279557. The next prime is 279571. The reversal of 279563 is 365972.

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 279563 - 2¹⁸ = 17419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (279523) 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, 2231 + ... + 2352.

It is an arithmetic number, because the mean of its divisors is an integer number (71052).

2²⁷⁹⁵⁶³ is an apocalyptic number.

279563 is a deficient number, since it is larger than the sum of its proper divisors (4645).

279563 is an equidigital number, since it uses as much as digits as its factorization.

279563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4644.

The product of its digits is 11340, while the sum is 32.

The square root of 279563 is about 528.7371747854. The cubic root of 279563 is about 65.3872738161.

The spelling of 279563 in words is "two hundred seventy-nine thousand, five hundred sixty-three".