279671 has 4 divisors (see below), whose sum is σ = 319632. Its totient is φ = 239712.

The previous prime is 279659. The next prime is 279679. The reversal of 279671 is 176972.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 279671 - 2⁶ = 279607 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a zygodrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (279679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19970 + ... + 19983.

It is an arithmetic number, because the mean of its divisors is an integer number (79908).

279671 is a Friedman number, since it can be written as 6^7-9-2^(7+1), using all its digits and the basic arithmetic operations.

2²⁷⁹⁶⁷¹ is an apocalyptic number.

279671 is a deficient number, since it is larger than the sum of its proper divisors (39961).

279671 is an equidigital number, since it uses as much as digits as its factorization.

279671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39960.

The product of its digits is 5292, while the sum is 32.

The square root of 279671 is about 528.8392950604. The cubic root of 279671 is about 65.3956928086.

The spelling of 279671 in words is "two hundred seventy-nine thousand, six hundred seventy-one".