279975 has 12 divisors (see below), whose sum is σ = 463016. Its totient is φ = 149280.

The previous prime is 279967. The next prime is 279977. The reversal of 279975 is 579972.

It is not a de Polignac number, because 279975 - 2³ = 279967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (279977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1792 + ... + 1941.

2²⁷⁹⁹⁷⁵ is an apocalyptic number.

279975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

279975 is a deficient number, since it is larger than the sum of its proper divisors (183041).

279975 is a wasteful number, since it uses less digits than its factorization.

279975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3746 (or 3741 counting only the distinct ones).

The product of its digits is 39690, while the sum is 39.

The square root of 279975 is about 529.1266389060. The cubic root of 279975 is about 65.4193790825.

Subtracting from 279975 its sum of digits (39), we obtain a 7-th power (279936 = 6⁷).

The spelling of 279975 in words is "two hundred seventy-nine thousand, nine hundred seventy-five".