13147439 has 4 divisors (see below), whose sum is σ = 13161624. Its totient is φ = 13133256.

The previous prime is 13147427. The next prime is 13147447. The reversal of 13147439 is 93474131.

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 13147439 - 2¹² = 13143343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13141439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5597 + ... + 7590.

It is an arithmetic number, because the mean of its divisors is an integer number (3290406).

Almost surely, 2^13147439 is an apocalyptic number.

13147439 is a deficient number, since it is larger than the sum of its proper divisors (14185).

13147439 is an equidigital number, since it uses as much as digits as its factorization.

13147439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14184.

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

The square root of 13147439 is about 3625.9397402604. The cubic root of 13147439 is about 236.0190483045.

The spelling of 13147439 in words is "thirteen million, one hundred forty-seven thousand, four hundred thirty-nine".