279798947 has 2 divisors, whose sum is σ = 279798948. Its totient is φ = 279798946.

The previous prime is 279798929. The next prime is 279798983. The reversal of 279798947 is 749897972.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 279798947 - 2⁸ = 279798691 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 279798947.

It is not a weakly prime, because it can be changed into another prime (279791947) 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 as a sum of consecutive naturals, namely, 139899473 + 139899474.

It is an arithmetic number, because the mean of its divisors is an integer number (139899474).

Almost surely, 2^279798947 is an apocalyptic number.

279798947 is a deficient number, since it is larger than the sum of its proper divisors (1).

279798947 is an equidigital number, since it uses as much as digits as its factorization.

279798947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16003008, while the sum is 62.

The square root of 279798947 is about 16727.1918444191. The cubic root of 279798947 is about 654.0566393788.

The spelling of 279798947 in words is "two hundred seventy-nine million, seven hundred ninety-eight thousand, nine hundred forty-seven".