279879005 has 16 divisors (see below), whose sum is σ = 396217344. Its totient is φ = 185725440.

The previous prime is 279879001. The next prime is 279879023. The reversal of 279879005 is 500978972.

It is not a de Polignac number, because 279879005 - 2² = 279879001 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (279879001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127892 + ... + 130061.

It is an arithmetic number, because the mean of its divisors is an integer number (24763584).

Almost surely, 2^279879005 is an apocalyptic number.

It is an amenable number.

279879005 is a deficient number, since it is larger than the sum of its proper divisors (116338339).

279879005 is a wasteful number, since it uses less digits than its factorization.

279879005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257996.

The product of its (nonzero) digits is 317520, while the sum is 47.

The square root of 279879005 is about 16729.5847228794. The cubic root of 279879005 is about 654.1190144922.

The spelling of 279879005 in words is "two hundred seventy-nine million, eight hundred seventy-nine thousand, five".