13520335069 has 2 divisors, whose sum is σ = 13520335070. Its totient is φ = 13520335068.

The previous prime is 13520335007. The next prime is 13520335121. The reversal of 13520335069 is 96053302531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13198563225 + 321771844 = 114885^2 + 17938^2 .

It is a cyclic number.

It is not a de Polignac number, because 13520335069 - 2¹⁷ = 13520203997 is a prime.

It is a super-2 number, since 2×13520335069² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13520335469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6760167534 + 6760167535.

It is an arithmetic number, because the mean of its divisors is an integer number (6760167535).

Almost surely, 2^13520335069 is an apocalyptic number.

It is an amenable number.

13520335069 is a deficient number, since it is larger than the sum of its proper divisors (1).

13520335069 is an equidigital number, since it uses as much as digits as its factorization.

13520335069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72900, while the sum is 37.

The spelling of 13520335069 in words is "thirteen billion, five hundred twenty million, three hundred thirty-five thousand, sixty-nine".