279889 has 4 divisors (see below), whose sum is σ = 294640. Its totient is φ = 265140.

The previous prime is 279883. The next prime is 279913. The reversal of 279889 is 988972.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 279889 - 2⁵ = 279857 is a prime.

It is a d-powerful number, because it can be written as 2¹⁸ + 7⁵ + 8² + 9² + 8² + 9³ .

It is a Duffinian number.

It is a nialpdrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (279883) 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 3 ways as a sum of consecutive naturals, for example, 7347 + ... + 7384.

It is an arithmetic number, because the mean of its divisors is an integer number (73660).

2²⁷⁹⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

279889 is a deficient number, since it is larger than the sum of its proper divisors (14751).

279889 is a wasteful number, since it uses less digits than its factorization.

279889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14750.

The product of its digits is 72576, while the sum is 43.

The square root of 279889 is about 529.0453666747. The cubic root of 279889 is about 65.4126801002.

The spelling of 279889 in words is "two hundred seventy-nine thousand, eight hundred eighty-nine".