1279057612873 has 2 divisors, whose sum is σ = 1279057612874. Its totient is φ = 1279057612872.

The previous prime is 1279057612817. The next prime is 1279057612897. The reversal of 1279057612873 is 3782167509721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1228734561289 + 50323051584 = 1108483^2 + 224328^2 .

It is a cyclic number.

It is not a de Polignac number, because 1279057612873 - 2²⁹ = 1278520741961 is a prime.

It is not a weakly prime, because it can be changed into another prime (1279057616873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639528806436 + 639528806437.

It is an arithmetic number, because the mean of its divisors is an integer number (639528806437).

Almost surely, 2^{1279057612873} is an apocalyptic number.

It is an amenable number.

1279057612873 is a deficient number, since it is larger than the sum of its proper divisors (1).

1279057612873 is an equidigital number, since it uses as much as digits as its factorization.

1279057612873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8890560, while the sum is 58.

The spelling of 1279057612873 in words is "one trillion, two hundred seventy-nine billion, fifty-seven million, six hundred twelve thousand, eight hundred seventy-three".