13738561 has 2 divisors, whose sum is σ = 13738562. Its totient is φ = 13738560.

The previous prime is 13738559. The next prime is 13738579. The reversal of 13738561 is 16583731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9090225 + 4648336 = 3015^2 + 2156^2 .

It is an emirp because it is prime and its reverse (16583731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13738561 - 2¹ = 13738559 is a prime.

Together with 13738559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13738511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6869280 + 6869281.

It is an arithmetic number, because the mean of its divisors is an integer number (6869281).

Almost surely, 2^13738561 is an apocalyptic number.

It is an amenable number.

13738561 is a deficient number, since it is larger than the sum of its proper divisors (1).

13738561 is an equidigital number, since it uses as much as digits as its factorization.

13738561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 34.

The square root of 13738561 is about 3706.5564881707. The cubic root of 13738561 is about 239.5045392073.

The spelling of 13738561 in words is "thirteen million, seven hundred thirty-eight thousand, five hundred sixty-one".