13449509 has 2 divisors, whose sum is σ = 13449510. Its totient is φ = 13449508.

The previous prime is 13449467. The next prime is 13449521. The reversal of 13449509 is 90594431.

13449509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13118884 + 330625 = 3622^2 + 575^2 .

It is a cyclic number.

It is not a de Polignac number, because 13449509 - 2⁸ = 13449253 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13449529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6724754 + 6724755.

It is an arithmetic number, because the mean of its divisors is an integer number (6724755).

Almost surely, 2^13449509 is an apocalyptic number.

It is an amenable number.

13449509 is a deficient number, since it is larger than the sum of its proper divisors (1).

13449509 is an equidigital number, since it uses as much as digits as its factorization.

13449509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 13449509 is about 3667.3572228514. The cubic root of 13449509 is about 237.8129370682.

The spelling of 13449509 in words is "thirteen million, four hundred forty-nine thousand, five hundred nine".