279884489 has 2 divisors, whose sum is σ = 279884490. Its totient is φ = 279884488.

The previous prime is 279884477. The next prime is 279884519. The reversal of 279884489 is 984488972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204490000 + 75394489 = 14300^2 + 8683^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-279884489 is a prime.

It is a super-2 number, since 2×279884489² = 156670654365582242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (279884419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139942244 + 139942245.

It is an arithmetic number, because the mean of its divisors is an integer number (139942245).

Almost surely, 2^279884489 is an apocalyptic number.

It is an amenable number.

279884489 is a deficient number, since it is larger than the sum of its proper divisors (1).

279884489 is an equidigital number, since it uses as much as digits as its factorization.

279884489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9289728, while the sum is 59.

The square root of 279884489 is about 16729.7486233356. The cubic root of 279884489 is about 654.1232867732.

The spelling of 279884489 in words is "two hundred seventy-nine million, eight hundred eighty-four thousand, four hundred eighty-nine".