13587649 has 2 divisors, whose sum is σ = 13587650. Its totient is φ = 13587648.

The previous prime is 13587619. The next prime is 13587671. The reversal of 13587649 is 94678531.

13587649 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., 11778624 + 1809025 = 3432^2 + 1345^2 .

It is an emirp because it is prime and its reverse (94678531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13587649 - 2¹⁵ = 13554881 is a prime.

It is equal to p₈₈₄₉₅₉ and since 13587649 and 884959 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (13587619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6793824 + 6793825.

It is an arithmetic number, because the mean of its divisors is an integer number (6793825).

Almost surely, 2^13587649 is an apocalyptic number.

It is an amenable number.

13587649 is a deficient number, since it is larger than the sum of its proper divisors (1).

13587649 is an equidigital number, since it uses as much as digits as its factorization.

13587649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 43.

The square root of 13587649 is about 3686.1428349970. The cubic root of 13587649 is about 238.6243581135.

The spelling of 13587649 in words is "thirteen million, five hundred eighty-seven thousand, six hundred forty-nine".