279389 has 6 divisors (see below), whose sum is σ = 307230. Its totient is φ = 253880.

The previous prime is 279353. The next prime is 279397. The reversal of 279389 is 983972.

It can be written as a sum of positive squares in only one way, i.e., 267289 + 12100 = 517^2 + 110^2 .

It is a de Polignac number, because none of the positive numbers 2^k-279389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (279329) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1034 + ... + 1275.

It is an arithmetic number, because the mean of its divisors is an integer number (51205).

2²⁷⁹³⁸⁹ is an apocalyptic number.

It is an amenable number.

279389 is a deficient number, since it is larger than the sum of its proper divisors (27841).

279389 is a wasteful number, since it uses less digits than its factorization.

279389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2331 (or 2320 counting only the distinct ones).

The product of its digits is 27216, while the sum is 38.

The square root of 279389 is about 528.5726061763. The cubic root of 279389 is about 65.3737053219.

It can be divided in two parts, 2793 and 89, that added together give a palindrome (2882).

The spelling of 279389 in words is "two hundred seventy-nine thousand, three hundred eighty-nine".