13520728597 has 2 divisors, whose sum is σ = 13520728598. Its totient is φ = 13520728596.

The previous prime is 13520728553. The next prime is 13520728603. The reversal of 13520728597 is 79582702531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9419478916 + 4101249681 = 97054^2 + 64041^2 .

It is a cyclic number.

It is not a de Polignac number, because 13520728597 - 2²⁷ = 13386510869 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13520728597.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13520728537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6760364298 + 6760364299.

It is an arithmetic number, because the mean of its divisors is an integer number (6760364299).

Almost surely, 2^13520728597 is an apocalyptic number.

It is an amenable number.

13520728597 is a deficient number, since it is larger than the sum of its proper divisors (1).

13520728597 is an equidigital number, since it uses as much as digits as its factorization.

13520728597 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1058400, while the sum is 49.

The spelling of 13520728597 in words is "thirteen billion, five hundred twenty million, seven hundred twenty-eight thousand, five hundred ninety-seven".