279798979 has 8 divisors (see below), whose sum is σ = 298755072. Its totient is φ = 261408840.

The previous prime is 279798947. The next prime is 279798983. The reversal of 279798979 is 979897972.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 279798979 - 2⁵ = 279798947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (279798929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140467 + ... + 142444.

It is an arithmetic number, because the mean of its divisors is an integer number (37344384).

Almost surely, 2^279798979 is an apocalyptic number.

279798979 is a deficient number, since it is larger than the sum of its proper divisors (18956093).

279798979 is a wasteful number, since it uses less digits than its factorization.

279798979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282977.

The product of its digits is 36006768, while the sum is 67.

The square root of 279798979 is about 16727.1928009454. The cubic root of 279798979 is about 654.0566643132.

The spelling of 279798979 in words is "two hundred seventy-nine million, seven hundred ninety-eight thousand, nine hundred seventy-nine".