13680449 has 4 divisors (see below), whose sum is σ = 13771200. Its totient is φ = 13589700.

The previous prime is 13680439. The next prime is 13680479. The reversal of 13680449 is 94408631.

13680449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13680449 - 2¹² = 13676353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13680439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45149 + ... + 45450.

It is an arithmetic number, because the mean of its divisors is an integer number (3442800).

Almost surely, 2^13680449 is an apocalyptic number.

It is an amenable number.

13680449 is a deficient number, since it is larger than the sum of its proper divisors (90751).

13680449 is an equidigital number, since it uses as much as digits as its factorization.

13680449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90750.

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

The square root of 13680449 is about 3698.7090991317. The cubic root of 13680449 is about 239.1663728395.

The spelling of 13680449 in words is "thirteen million, six hundred eighty thousand, four hundred forty-nine".