13138449 has 4 divisors (see below), whose sum is σ = 17517936. Its totient is φ = 8758964.

The previous prime is 13138439. The next prime is 13138453. The reversal of 13138449 is 94483131.

13138449 is digitally balanced in base 3, 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 13138449 - 2⁸ = 13138193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13138439) 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, 2189739 + ... + 2189744.

It is an arithmetic number, because the mean of its divisors is an integer number (4379484).

Almost surely, 2^13138449 is an apocalyptic number.

It is an amenable number.

13138449 is a deficient number, since it is larger than the sum of its proper divisors (4379487).

13138449 is an equidigital number, since it uses as much as digits as its factorization.

13138449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4379486.

The product of its digits is 10368, while the sum is 33.

The square root of 13138449 is about 3624.6998496427. The cubic root of 13138449 is about 235.9652407392.

The spelling of 13138449 in words is "thirteen million, one hundred thirty-eight thousand, four hundred forty-nine".