13213944539 has 2 divisors, whose sum is σ = 13213944540. Its totient is φ = 13213944538.

The previous prime is 13213944529. The next prime is 13213944593. The reversal of 13213944539 is 93544931231.

Together with next prime (13213944593) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13213944539 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13213944539.

It is not a weakly prime, because it can be changed into another prime (13213944529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6606972269 + 6606972270.

It is an arithmetic number, because the mean of its divisors is an integer number (6606972270).

Almost surely, 2^13213944539 is an apocalyptic number.

13213944539 is a deficient number, since it is larger than the sum of its proper divisors (1).

13213944539 is an equidigital number, since it uses as much as digits as its factorization.

13213944539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 349920, while the sum is 44.

The spelling of 13213944539 in words is "thirteen billion, two hundred thirteen million, nine hundred forty-four thousand, five hundred thirty-nine".