13309649 has 2 divisors, whose sum is σ = 13309650. Its totient is φ = 13309648.

The previous prime is 13309643. The next prime is 13309693. The reversal of 13309649 is 94690331.

13309649 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., 7059649 + 6250000 = 2657^2 + 2500^2 .

It is a cyclic number.

It is not a de Polignac number, because 13309649 - 2⁸ = 13309393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13309643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6654824 + 6654825.

It is an arithmetic number, because the mean of its divisors is an integer number (6654825).

Almost surely, 2^13309649 is an apocalyptic number.

It is an amenable number.

13309649 is a deficient number, since it is larger than the sum of its proper divisors (1).

13309649 is an equidigital number, since it uses as much as digits as its factorization.

13309649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 13309649 is about 3648.2391643093. The cubic root of 13309649 is about 236.9857326715.

The spelling of 13309649 in words is "thirteen million, three hundred nine thousand, six hundred forty-nine".