13087649 has 2 divisors, whose sum is σ = 13087650. Its totient is φ = 13087648.

The previous prime is 13087639. The next prime is 13087687. The reversal of 13087649 is 94678031.

It is an a-pointer prime, because the next prime (13087687) can be obtained adding 13087649 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7480225 + 5607424 = 2735^2 + 2368^2 .

It is a cyclic number.

It is not a de Polignac number, because 13087649 - 2²⁰ = 12039073 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (13087639) 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, 6543824 + 6543825.

It is an arithmetic number, because the mean of its divisors is an integer number (6543825).

Almost surely, 2^13087649 is an apocalyptic number.

It is an amenable number.

13087649 is a deficient number, since it is larger than the sum of its proper divisors (1).

13087649 is an equidigital number, since it uses as much as digits as its factorization.

13087649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 13087649 is about 3617.6855861172. The cubic root of 13087649 is about 235.6607269454.

The spelling of 13087649 in words is "thirteen million, eighty-seven thousand, six hundred forty-nine".