279873 has 18 divisors (see below), whose sum is σ = 446082. Its totient is φ = 168960.

The previous prime is 279863. The next prime is 279883. The reversal of 279873 is 378972.

It is an interprime number because it is at equal distance from previous prime (279863) and next prime (279883).

It can be written as a sum of positive squares in only one way, i.e., 278784 + 1089 = 528^2 + 33^2 .

It is not a de Polignac number, because 279873 - 2⁴ = 279857 is a prime.

It is a super-2 number, since 2×279873² = 156657792258, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 279873.

It is not an unprimeable number, because it can be changed into a prime (279823) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 961 + ... + 1217.

2²⁷⁹⁸⁷³ is an apocalyptic number.

It is an amenable number.

279873 is a deficient number, since it is larger than the sum of its proper divisors (166209).

279873 is a wasteful number, since it uses less digits than its factorization.

279873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285 (or 271 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 279873 is about 529.0302448821. The cubic root of 279873 is about 65.4114336265.

Subtracting 279873 from its reverse (378972), we obtain a palindrome (99099).

The spelling of 279873 in words is "two hundred seventy-nine thousand, eight hundred seventy-three".