13518814979 has 2 divisors, whose sum is σ = 13518814980. Its totient is φ = 13518814978.

The previous prime is 13518814973. The next prime is 13518814997. The reversal of 13518814979 is 97941881531.

It is a happy number.

13518814979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (13518814997) 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-13518814979 is a prime.

It is not a weakly prime, because it can be changed into another prime (13518814973) 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, 6759407489 + 6759407490.

It is an arithmetic number, because the mean of its divisors is an integer number (6759407490).

Almost surely, 2^13518814979 is an apocalyptic number.

13518814979 is a deficient number, since it is larger than the sum of its proper divisors (1).

13518814979 is an equidigital number, since it uses as much as digits as its factorization.

13518814979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 56.

The spelling of 13518814979 in words is "thirteen billion, five hundred eighteen million, eight hundred fourteen thousand, nine hundred seventy-nine".