279560987 has 4 divisors (see below), whose sum is σ = 284144016. Its totient is φ = 274977960.

The previous prime is 279560977. The next prime is 279560989. The reversal of 279560987 is 789065972.

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 279560987 - 2⁶ = 279560923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (279560989) 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 3 ways as a sum of consecutive naturals, for example, 2291423 + ... + 2291544.

It is an arithmetic number, because the mean of its divisors is an integer number (71036004).

Almost surely, 2^279560987 is an apocalyptic number.

279560987 is a deficient number, since it is larger than the sum of its proper divisors (4583029).

279560987 is an equidigital number, since it uses as much as digits as its factorization.

279560987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4583028.

The product of its (nonzero) digits is 1905120, while the sum is 53.

The square root of 279560987 is about 16720.0773622612. The cubic root of 279560987 is about 653.8711687489.

The spelling of 279560987 in words is "two hundred seventy-nine million, five hundred sixty thousand, nine hundred eighty-seven".