13538197 has 2 divisors, whose sum is σ = 13538198. Its totient is φ = 13538196.

The previous prime is 13538179. The next prime is 13538233. The reversal of 13538197 is 79183531.

It is a happy number.

Together with previous prime (13538179) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12680721 + 857476 = 3561^2 + 926^2 .

It is a cyclic number.

It is not a de Polignac number, because 13538197 - 2¹⁹ = 13013909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13538177) 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, 6769098 + 6769099.

It is an arithmetic number, because the mean of its divisors is an integer number (6769099).

Almost surely, 2^13538197 is an apocalyptic number.

It is an amenable number.

13538197 is a deficient number, since it is larger than the sum of its proper divisors (1).

13538197 is an equidigital number, since it uses as much as digits as its factorization.

13538197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 37.

The square root of 13538197 is about 3679.4288959022. The cubic root of 13538197 is about 238.3345165421.

The spelling of 13538197 in words is "thirteen million, five hundred thirty-eight thousand, one hundred ninety-seven".