1308943440613 has 2 divisors, whose sum is σ = 1308943440614. Its totient is φ = 1308943440612.

The previous prime is 1308943440601. The next prime is 1308943440641. The reversal of 1308943440613 is 3160443498031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 729423607969 + 579519832644 = 854063^2 + 761262^2 .

It is a cyclic number.

It is not a de Polignac number, because 1308943440613 - 2²⁵ = 1308909886181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1308943440683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 654471720306 + 654471720307.

It is an arithmetic number, because the mean of its divisors is an integer number (654471720307).

Almost surely, 2^{1308943440613} is an apocalyptic number.

It is an amenable number.

1308943440613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1308943440613 is an equidigital number, since it uses as much as digits as its factorization.

1308943440613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 746496, while the sum is 46.

The spelling of 1308943440613 in words is "one trillion, three hundred eight billion, nine hundred forty-three million, four hundred forty thousand, six hundred thirteen".