13608449 has 4 divisors (see below), whose sum is σ = 14408964. Its totient is φ = 12807936.

The previous prime is 13608401. The next prime is 13608457. The reversal of 13608449 is 94480631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11343424 + 2265025 = 3368^2 + 1505^2 .

It is not a de Polignac number, because 13608449 - 2²⁰ = 12559873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13608649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400232 + ... + 400265.

It is an arithmetic number, because the mean of its divisors is an integer number (3602241).

Almost surely, 2^13608449 is an apocalyptic number.

It is an amenable number.

13608449 is a deficient number, since it is larger than the sum of its proper divisors (800515).

13608449 is an equidigital number, since it uses as much as digits as its factorization.

13608449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800514.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 13608449 is about 3688.9631334563. The cubic root of 13608449 is about 238.7460582484.

The spelling of 13608449 in words is "thirteen million, six hundred eight thousand, four hundred forty-nine".