279999949997 has 2 divisors, whose sum is σ = 279999949998. Its totient is φ = 279999949996.

The previous prime is 279999949973. The next prime is 279999950003. The reversal of 279999949997 is 799949999972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 277693165156 + 2306784841 = 526966^2 + 48029^2 .

It is a cyclic number.

It is not a de Polignac number, because 279999949997 - 2¹⁸ = 279999687853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (279999949907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139999974998 + 139999974999.

It is an arithmetic number, because the mean of its divisors is an integer number (139999974999).

Almost surely, 2^279999949997 is an apocalyptic number.

It is an amenable number.

279999949997 is a deficient number, since it is larger than the sum of its proper divisors (1).

279999949997 is an equidigital number, since it uses as much as digits as its factorization.

279999949997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16874314632, while the sum is 92.

The spelling of 279999949997 in words is "two hundred seventy-nine billion, nine hundred ninety-nine million, nine hundred forty-nine thousand, nine hundred ninety-seven".