279925 has 6 divisors (see below), whose sum is σ = 347138. Its totient is φ = 223920.

The previous prime is 279919. The next prime is 279941. The reversal of 279925 is 529972.

It can be written as a sum of positive squares in 3 ways, for example, as 3249 + 276676 = 57^2 + 526^2 .

It is not a de Polignac number, because 279925 - 2⁹ = 279413 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 6.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5574 + ... + 5623.

279925 is a Friedman number, since it can be written as (9-5+2)^7-9-2, using all its digits and the basic arithmetic operations.

2²⁷⁹⁹²⁵ is an apocalyptic number.

279925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

279925 is a deficient number, since it is larger than the sum of its proper divisors (67213).

279925 is a wasteful number, since it uses less digits than its factorization.

279925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11207 (or 11202 counting only the distinct ones).

The product of its digits is 11340, while the sum is 34.

The square root of 279925 is about 529.0793891279. The cubic root of 279925 is about 65.4154844923.

Subtracting 279925 from its reverse (529972), we obtain a cube (250047 = 63³).

The spelling of 279925 in words is "two hundred seventy-nine thousand, nine hundred twenty-five".