13129387549 has 2 divisors, whose sum is σ = 13129387550. Its totient is φ = 13129387548.

The previous prime is 13129387457. The next prime is 13129387553. The reversal of 13129387549 is 94578392131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11958516025 + 1170871524 = 109355^2 + 34218^2 .

It is a cyclic number.

It is not a de Polignac number, because 13129387549 - 2⁷ = 13129387421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13129387496 and 13129387505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13129307549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6564693774 + 6564693775.

It is an arithmetic number, because the mean of its divisors is an integer number (6564693775).

Almost surely, 2^13129387549 is an apocalyptic number.

It is an amenable number.

13129387549 is a deficient number, since it is larger than the sum of its proper divisors (1).

13129387549 is an equidigital number, since it uses as much as digits as its factorization.

13129387549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 52.

The spelling of 13129387549 in words is "thirteen billion, one hundred twenty-nine million, three hundred eighty-seven thousand, five hundred forty-nine".