13731449 has 4 divisors (see below), whose sum is σ = 13936464. Its totient is φ = 13526436.

The previous prime is 13731439. The next prime is 13731451. The reversal of 13731449 is 94413731.

13731449 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 a de Polignac number, because none of the positive numbers 2^k-13731449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13731409) 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, 102407 + ... + 102540.

It is an arithmetic number, because the mean of its divisors is an integer number (3484116).

Almost surely, 2^13731449 is an apocalyptic number.

It is an amenable number.

13731449 is a deficient number, since it is larger than the sum of its proper divisors (205015).

13731449 is an equidigital number, since it uses as much as digits as its factorization.

13731449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205014.

The product of its digits is 9072, while the sum is 32.

The square root of 13731449 is about 3705.5969829435. The cubic root of 13731449 is about 239.4632042065.

The spelling of 13731449 in words is "thirteen million, seven hundred thirty-one thousand, four hundred forty-nine".