13447913 has 4 divisors (see below), whose sum is σ = 13457220. Its totient is φ = 13438608.

The previous prime is 13447891. The next prime is 13447919. The reversal of 13447913 is 31974431.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 31974431 = 61 ⋅524171.

It can be written as a sum of positive squares in 2 ways, for example, as 12652249 + 795664 = 3557^2 + 892^2 .

It is a cyclic number.

It is not a de Polignac number, because 13447913 - 2¹⁶ = 13382377 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13447913.

It is not an unprimeable number, because it can be changed into a prime (13447919) 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, 1970 + ... + 5547.

It is an arithmetic number, because the mean of its divisors is an integer number (3364305).

Almost surely, 2^13447913 is an apocalyptic number.

It is an amenable number.

13447913 is a deficient number, since it is larger than the sum of its proper divisors (9307).

13447913 is an equidigital number, since it uses as much as digits as its factorization.

13447913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9306.

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

The square root of 13447913 is about 3667.1396210125. The cubic root of 13447913 is about 237.8035299228.

The spelling of 13447913 in words is "thirteen million, four hundred forty-seven thousand, nine hundred thirteen".