13509361169 has 2 divisors, whose sum is σ = 13509361170. Its totient is φ = 13509361168.

The previous prime is 13509361147. The next prime is 13509361181. The reversal of 13509361169 is 96116390531.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9663873025 + 3845488144 = 98305^2 + 62012^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13509361169 is a prime.

It is a super-2 number, since 2×13509361169² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13509361139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6754680584 + 6754680585.

It is an arithmetic number, because the mean of its divisors is an integer number (6754680585).

Almost surely, 2^13509361169 is an apocalyptic number.

It is an amenable number.

13509361169 is a deficient number, since it is larger than the sum of its proper divisors (1).

13509361169 is an equidigital number, since it uses as much as digits as its factorization.

13509361169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 131220, while the sum is 44.

The spelling of 13509361169 in words is "thirteen billion, five hundred nine million, three hundred sixty-one thousand, one hundred sixty-nine".