279123 has 16 divisors (see below), whose sum is σ = 425376. Its totient is φ = 161280.

The previous prime is 279121. The next prime is 279127. The reversal of 279123 is 321972.

It is not a de Polignac number, because 279123 - 2¹ = 279121 is a prime.

279123 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 279093 and 279102.

It is not an unprimeable number, because it can be changed into a prime (279121) 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 15 ways as a sum of consecutive naturals, for example, 453 + ... + 873.

It is an arithmetic number, because the mean of its divisors is an integer number (26586).

2²⁷⁹¹²³ is an apocalyptic number.

279123 is a deficient number, since it is larger than the sum of its proper divisors (146253).

279123 is a wasteful number, since it uses less digits than its factorization.

279123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454.

The product of its digits is 756, while the sum is 24.

The square root of 279123 is about 528.3209251960. The cubic root of 279123 is about 65.3529517880.

Subtracting 279123 from its reverse (321972), we obtain a square (42849 = 207²).

The spelling of 279123 in words is "two hundred seventy-nine thousand, one hundred twenty-three".