13575649 has 2 divisors, whose sum is σ = 13575650. Its totient is φ = 13575648.

The previous prime is 13575647. The next prime is 13575689. The reversal of 13575649 is 94657531.

It is an a-pointer prime, because the next prime (13575689) can be obtained adding 13575649 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7524049 + 6051600 = 2743^2 + 2460^2 .

It is an emirp because it is prime and its reverse (94657531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13575649 - 2¹ = 13575647 is a prime.

Together with 13575647, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13575643) 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, 6787824 + 6787825.

It is an arithmetic number, because the mean of its divisors is an integer number (6787825).

Almost surely, 2^13575649 is an apocalyptic number.

It is an amenable number.

13575649 is a deficient number, since it is larger than the sum of its proper divisors (1).

13575649 is an equidigital number, since it uses as much as digits as its factorization.

13575649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 113400, while the sum is 40.

The square root of 13575649 is about 3684.5147577395. The cubic root of 13575649 is about 238.5540899928.

The spelling of 13575649 in words is "thirteen million, five hundred seventy-five thousand, six hundred forty-nine".