13447939 has 4 divisors (see below), whose sum is σ = 14032656. Its totient is φ = 12863224.

The previous prime is 13447937. The next prime is 13447943. The reversal of 13447939 is 93974431.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 13447939 - 2¹ = 13447937 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13447937) 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, 292324 + ... + 292369.

It is an arithmetic number, because the mean of its divisors is an integer number (3508164).

Almost surely, 2^13447939 is an apocalyptic number.

13447939 is a deficient number, since it is larger than the sum of its proper divisors (584717).

13447939 is an equidigital number, since it uses as much as digits as its factorization.

13447939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584716.

The product of its digits is 81648, while the sum is 40.

The square root of 13447939 is about 3667.1431660081. The cubic root of 13447939 is about 237.8036831780.

The spelling of 13447939 in words is "thirteen million, four hundred forty-seven thousand, nine hundred thirty-nine".