13149509 has 2 divisors, whose sum is σ = 13149510. Its totient is φ = 13149508.

The previous prime is 13149497. The next prime is 13149523. The reversal of 13149509 is 90594131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13118884 + 30625 = 3622^2 + 175^2 .

It is an emirp because it is prime and its reverse (90594131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13149509 - 2¹² = 13145413 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13149589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6574754 + 6574755.

It is an arithmetic number, because the mean of its divisors is an integer number (6574755).

Almost surely, 2^13149509 is an apocalyptic number.

It is an amenable number.

13149509 is a deficient number, since it is larger than the sum of its proper divisors (1).

13149509 is an equidigital number, since it uses as much as digits as its factorization.

13149509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 13149509 is about 3626.2251722694. The cubic root of 13149509 is about 236.0314343363.

The spelling of 13149509 in words is "thirteen million, one hundred forty-nine thousand, five hundred nine".