1309435896709 has 2 divisors, whose sum is σ = 1309435896710. Its totient is φ = 1309435896708.

The previous prime is 1309435896689. The next prime is 1309435896719. The reversal of 1309435896709 is 9076985349031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1052491328100 + 256944568609 = 1025910^2 + 506897^2 .

It is a cyclic number.

It is not a de Polignac number, because 1309435896709 - 2⁷ = 1309435896581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1309435896719) 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, 654717948354 + 654717948355.

It is an arithmetic number, because the mean of its divisors is an integer number (654717948355).

Almost surely, 2^{1309435896709} is an apocalyptic number.

It is an amenable number.

1309435896709 is a deficient number, since it is larger than the sum of its proper divisors (1).

1309435896709 is an equidigital number, since it uses as much as digits as its factorization.

1309435896709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 44089920, while the sum is 64.

The spelling of 1309435896709 in words is "one trillion, three hundred nine billion, four hundred thirty-five million, eight hundred ninety-six thousand, seven hundred nine".