13487609 has 2 divisors, whose sum is σ = 13487610. Its totient is φ = 13487608.

The previous prime is 13487603. The next prime is 13487611. The reversal of 13487609 is 90678431.

13487609 is digitally balanced in base 3, 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., 7823209 + 5664400 = 2797^2 + 2380^2 .

It is a cyclic number.

It is not a de Polignac number, because 13487609 - 2¹² = 13483513 is a prime.

It is a Sophie Germain prime.

Together with 13487611, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (13487603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6743804 + 6743805.

It is an arithmetic number, because the mean of its divisors is an integer number (6743805).

Almost surely, 2^13487609 is an apocalyptic number.

It is an amenable number.

13487609 is a deficient number, since it is larger than the sum of its proper divisors (1).

13487609 is an equidigital number, since it uses as much as digits as its factorization.

13487609 is an evil number, because the sum of its binary digits is even.

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

The square root of 13487609 is about 3672.5480255539. The cubic root of 13487609 is about 238.0372855456.

The spelling of 13487609 in words is "thirteen million, four hundred eighty-seven thousand, six hundred nine".