279788754997 has 2 divisors, whose sum is σ = 279788754998. Its totient is φ = 279788754996.

The previous prime is 279788754977. The next prime is 279788755049. The reversal of 279788754997 is 799457887972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 260800190596 + 18988564401 = 510686^2 + 137799^2 .

It is a cyclic number.

It is not a de Polignac number, because 279788754997 - 2³⁵ = 245429016629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 279788754997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (279788754907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139894377498 + 139894377499.

It is an arithmetic number, because the mean of its divisors is an integer number (139894377499).

Almost surely, 2^279788754997 is an apocalyptic number.

It is an amenable number.

279788754997 is a deficient number, since it is larger than the sum of its proper divisors (1).

279788754997 is an equidigital number, since it uses as much as digits as its factorization.

279788754997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4480842240, while the sum is 82.

The spelling of 279788754997 in words is "two hundred seventy-nine billion, seven hundred eighty-eight million, seven hundred fifty-four thousand, nine hundred ninety-seven".