1309298889361 has 2 divisors, whose sum is σ = 1309298889362. Its totient is φ = 1309298889360.

The previous prime is 1309298889343. The next prime is 1309298889419. The reversal of 1309298889361 is 1639888929031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1142472388225 + 166826501136 = 1068865^2 + 408444^2 .

It is an emirp because it is prime and its reverse (1639888929031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1309298889361 - 2⁵ = 1309298889329 is a prime.

It is not a weakly prime, because it can be changed into another prime (1309298889961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 654649444680 + 654649444681.

It is an arithmetic number, because the mean of its divisors is an integer number (654649444681).

Almost surely, 2^{1309298889361} is an apocalyptic number.

It is an amenable number.

1309298889361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1309298889361 is an equidigital number, since it uses as much as digits as its factorization.

1309298889361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40310784, while the sum is 67.

The spelling of 1309298889361 in words is "one trillion, three hundred nine billion, two hundred ninety-eight million, eight hundred eighty-nine thousand, three hundred sixty-one".