279641979 has 24 divisors (see below), whose sum is σ = 421296512. Its totient is φ = 178536960.

The previous prime is 279641969. The next prime is 279642031. The reversal of 279641979 is 979146972.

It is not a de Polignac number, because 279641979 - 2⁸ = 279641723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (279641969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21897 + ... + 32229.

Almost surely, 2^279641979 is an apocalyptic number.

279641979 is a deficient number, since it is larger than the sum of its proper divisors (141654533).

279641979 is a wasteful number, since it uses less digits than its factorization.

279641979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10467 (or 10464 counting only the distinct ones).

The product of its digits is 1714608, while the sum is 54.

The square root of 279641979 is about 16722.4991852295. The cubic root of 279641979 is about 653.9343072921.

The spelling of 279641979 in words is "two hundred seventy-nine million, six hundred forty-one thousand, nine hundred seventy-nine".