279660979 has 16 divisors (see below), whose sum is σ = 315653184. Its totient is φ = 245836800.

The previous prime is 279660971. The next prime is 279660989. The reversal of 279660979 is 979066972.

It is a cyclic number.

It is not a de Polignac number, because 279660979 - 2³ = 279660971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (279660971) 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, 70119 + ... + 73999.

It is an arithmetic number, because the mean of its divisors is an integer number (19728324).

Almost surely, 2^279660979 is an apocalyptic number.

279660979 is a deficient number, since it is larger than the sum of its proper divisors (35992205).

279660979 is a wasteful number, since it uses less digits than its factorization.

279660979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4158.

The product of its (nonzero) digits is 2571912, while the sum is 55.

The square root of 279660979 is about 16723.0672724832. The cubic root of 279660979 is about 653.9491172650.

The spelling of 279660979 in words is "two hundred seventy-nine million, six hundred sixty thousand, nine hundred seventy-nine".