279198340873 has 2 divisors, whose sum is σ = 279198340874. Its totient is φ = 279198340872.

The previous prime is 279198340807. The next prime is 279198340943. The reversal of 279198340873 is 378043891972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202763785849 + 76434555024 = 450293^2 + 276468^2 .

It is a cyclic number.

It is not a de Polignac number, because 279198340873 - 2²⁵ = 279164786441 is a prime.

It is not a weakly prime, because it can be changed into another prime (279198340273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139599170436 + 139599170437.

It is an arithmetic number, because the mean of its divisors is an integer number (139599170437).

Almost surely, 2^279198340873 is an apocalyptic number.

It is an amenable number.

279198340873 is a deficient number, since it is larger than the sum of its proper divisors (1).

279198340873 is an equidigital number, since it uses as much as digits as its factorization.

279198340873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18289152, while the sum is 61.

The spelling of 279198340873 in words is "two hundred seventy-nine billion, one hundred ninety-eight million, three hundred forty thousand, eight hundred seventy-three".