13443441309 has 12 divisors (see below), whose sum is σ = 19501647516. Its totient is φ = 8923828032.

The previous prime is 13443441299. The next prime is 13443441311. The reversal of 13443441309 is 90314434431.

13443441309 is a `hidden beast` number, since 1 + 3 + 4 + 4 + 344 + 1 + 309 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8248635684 + 5194805625 = 90822^2 + 72075^2 .

It is not a de Polignac number, because 13443441309 - 2¹⁵ = 13443408541 is a prime.

It is a super-2 number, since 2×13443441309² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13443441329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3203302 + ... + 3207495.

It is an arithmetic number, because the mean of its divisors is an integer number (1625137293).

Almost surely, 2^13443441309 is an apocalyptic number.

It is an amenable number.

13443441309 is a deficient number, since it is larger than the sum of its proper divisors (6058206207).

13443441309 is a wasteful number, since it uses less digits than its factorization.

13443441309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6411036 (or 6411033 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The spelling of 13443441309 in words is "thirteen billion, four hundred forty-three million, four hundred forty-one thousand, three hundred nine".