279960089 has 2 divisors, whose sum is σ = 279960090. Its totient is φ = 279960088.

The previous prime is 279960061. The next prime is 279960127. The reversal of 279960089 is 980069972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 249798025 + 30162064 = 15805^2 + 5492^2 .

It is a cyclic number.

It is not a de Polignac number, because 279960089 - 2¹² = 279955993 is a prime.

It is not a weakly prime, because it can be changed into another prime (279920089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139980044 + 139980045.

It is an arithmetic number, because the mean of its divisors is an integer number (139980045).

Almost surely, 2^279960089 is an apocalyptic number.

It is an amenable number.

279960089 is a deficient number, since it is larger than the sum of its proper divisors (1).

279960089 is an equidigital number, since it uses as much as digits as its factorization.

279960089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 279960089 is about 16732.0079189558. The cubic root of 279960089 is about 654.1821768637.

The spelling of 279960089 in words is "two hundred seventy-nine million, nine hundred sixty thousand, eighty-nine".