13539557 has 2 divisors, whose sum is σ = 13539558. Its totient is φ = 13539556.

The previous prime is 13539511. The next prime is 13539563. The reversal of 13539557 is 75593531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12952801 + 586756 = 3599^2 + 766^2 .

It is a cyclic number.

It is not a de Polignac number, because 13539557 - 2⁸ = 13539301 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13539557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13530557) 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, 6769778 + 6769779.

It is an arithmetic number, because the mean of its divisors is an integer number (6769779).

Almost surely, 2^13539557 is an apocalyptic number.

It is an amenable number.

13539557 is a deficient number, since it is larger than the sum of its proper divisors (1).

13539557 is an equidigital number, since it uses as much as digits as its factorization.

13539557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70875, while the sum is 38.

The square root of 13539557 is about 3679.6137025509. The cubic root of 13539557 is about 238.3424970260.

The spelling of 13539557 in words is "thirteen million, five hundred thirty-nine thousand, five hundred fifty-seven".