39813486913 has 2 divisors, whose sum is σ = 39813486914. Its totient is φ = 39813486912.

The previous prime is 39813486859. The next prime is 39813486971. The reversal of 39813486913 is 31968431893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32250053889 + 7563433024 = 179583^2 + 86968^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39813486913 is a prime.

It is a super-2 number, since 2×39813486913² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (39813486113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19906743456 + 19906743457.

It is an arithmetic number, because the mean of its divisors is an integer number (19906743457).

Almost surely, 2^39813486913 is an apocalyptic number.

It is an amenable number.

39813486913 is a deficient number, since it is larger than the sum of its proper divisors (1).

39813486913 is an equidigital number, since it uses as much as digits as its factorization.

39813486913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3359232, while the sum is 55.

The spelling of 39813486913 in words is "thirty-nine billion, eight hundred thirteen million, four hundred eighty-six thousand, nine hundred thirteen".