13520579 has 2 divisors, whose sum is σ = 13520580. Its totient is φ = 13520578.

The previous prime is 13520531. The next prime is 13520597. The reversal of 13520579 is 97502531.

Together with next prime (13520597) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13520579 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13520509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6760289 + 6760290.

It is an arithmetic number, because the mean of its divisors is an integer number (6760290).

Almost surely, 2^13520579 is an apocalyptic number.

13520579 is a deficient number, since it is larger than the sum of its proper divisors (1).

13520579 is an equidigital number, since it uses as much as digits as its factorization.

13520579 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 13520579 is about 3677.0339949476. The cubic root of 13520579 is about 238.2310857262.

The spelling of 13520579 in words is "thirteen million, five hundred twenty thousand, five hundred seventy-nine".