1298109626089 has 2 divisors, whose sum is σ = 1298109626090. Its totient is φ = 1298109626088.

The previous prime is 1298109626083. The next prime is 1298109626123. The reversal of 1298109626089 is 9806269018921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 986678662489 + 311430963600 = 993317^2 + 558060^2 .

It is a cyclic number.

It is not a de Polignac number, because 1298109626089 - 2³ = 1298109626081 is a prime.

It is not a weakly prime, because it can be changed into another prime (1298109626081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649054813044 + 649054813045.

It is an arithmetic number, because the mean of its divisors is an integer number (649054813045).

Almost surely, 2^{1298109626089} is an apocalyptic number.

It is an amenable number.

1298109626089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1298109626089 is an equidigital number, since it uses as much as digits as its factorization.

1298109626089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6718464, while the sum is 61.

The spelling of 1298109626089 in words is "one trillion, two hundred ninety-eight billion, one hundred nine million, six hundred twenty-six thousand, eighty-nine".