13656449 has 2 divisors, whose sum is σ = 13656450. Its totient is φ = 13656448.

The previous prime is 13656443. The next prime is 13656451. The reversal of 13656449 is 94465631.

13656449 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., 13104400 + 552049 = 3620^2 + 743^2 .

It is a cyclic number.

It is not a de Polignac number, because 13656449 - 2²⁰ = 12607873 is a prime.

Together with 13656451, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13656443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6828224 + 6828225.

It is an arithmetic number, because the mean of its divisors is an integer number (6828225).

Almost surely, 2^13656449 is an apocalyptic number.

It is an amenable number.

13656449 is a deficient number, since it is larger than the sum of its proper divisors (1).

13656449 is an equidigital number, since it uses as much as digits as its factorization.

13656449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 38.

The square root of 13656449 is about 3695.4632997772. The cubic root of 13656449 is about 239.0264321881.

The spelling of 13656449 in words is "thirteen million, six hundred fifty-six thousand, four hundred forty-nine".