13317649 has 2 divisors, whose sum is σ = 13317650. Its totient is φ = 13317648.

The previous prime is 13317617. The next prime is 13317671. The reversal of 13317649 is 94671331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9828225 + 3489424 = 3135^2 + 1868^2 .

It is an emirp because it is prime and its reverse (94671331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13317649 - 2⁵ = 13317617 is a prime.

It is not a weakly prime, because it can be changed into another prime (13317679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6658824 + 6658825.

It is an arithmetic number, because the mean of its divisors is an integer number (6658825).

Almost surely, 2^13317649 is an apocalyptic number.

It is an amenable number.

13317649 is a deficient number, since it is larger than the sum of its proper divisors (1).

13317649 is an equidigital number, since it uses as much as digits as its factorization.

13317649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 34.

The square root of 13317649 is about 3649.3354189496. The cubic root of 13317649 is about 237.0332046506.

It can be divided in two parts, 133176 and 49, that added together give a square (133225 = 365²).

The spelling of 13317649 in words is "thirteen million, three hundred seventeen thousand, six hundred forty-nine".