13463376721 has 2 divisors, whose sum is σ = 13463376722. Its totient is φ = 13463376720.

The previous prime is 13463376697. The next prime is 13463376727. The reversal of 13463376721 is 12767336431.

It is a happy number.

13463376721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11719145025 + 1744231696 = 108255^2 + 41764^2 .

It is an emirp because it is prime and its reverse (12767336431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13463376721 - 2³³ = 4873442129 is a prime.

It is not a weakly prime, because it can be changed into another prime (13463376727) 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, 6731688360 + 6731688361.

It is an arithmetic number, because the mean of its divisors is an integer number (6731688361).

Almost surely, 2^13463376721 is an apocalyptic number.

It is an amenable number.

13463376721 is a deficient number, since it is larger than the sum of its proper divisors (1).

13463376721 is an equidigital number, since it uses as much as digits as its factorization.

13463376721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 381024, while the sum is 43.

The spelling of 13463376721 in words is "thirteen billion, four hundred sixty-three million, three hundred seventy-six thousand, seven hundred twenty-one".