13538641 has 2 divisors, whose sum is σ = 13538642. Its totient is φ = 13538640.

The previous prime is 13538627. The next prime is 13538663. The reversal of 13538641 is 14683531.

13538641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13535041 + 3600 = 3679^2 + 60^2 .

It is an emirp because it is prime and its reverse (14683531) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13538641 is a prime.

It is not a weakly prime, because it can be changed into another prime (13539641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6769320 + 6769321.

It is an arithmetic number, because the mean of its divisors is an integer number (6769321).

Almost surely, 2^13538641 is an apocalyptic number.

It is an amenable number.

13538641 is a deficient number, since it is larger than the sum of its proper divisors (1).

13538641 is an equidigital number, since it uses as much as digits as its factorization.

13538641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 31.

The square root of 13538641 is about 3679.4892308580. The cubic root of 13538641 is about 238.3371219941.

The spelling of 13538641 in words is "thirteen million, five hundred thirty-eight thousand, six hundred forty-one".