12443813 has 16 divisors (see below), whose sum is σ = 13970880. Its totient is φ = 11026176.

The previous prime is 12443791. The next prime is 12443819. The reversal of 12443813 is 31834421.

It is a cyclic number.

It is not a de Polignac number, because 12443813 - 2¹⁶ = 12378277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12443819) 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 15 ways as a sum of consecutive naturals, for example, 20906 + ... + 21492.

It is an arithmetic number, because the mean of its divisors is an integer number (873180).

Almost surely, 2^12443813 is an apocalyptic number.

It is an amenable number.

12443813 is a deficient number, since it is larger than the sum of its proper divisors (1527067).

12443813 is a wasteful number, since it uses less digits than its factorization.

12443813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676.

The product of its digits is 2304, while the sum is 26.

The square root of 12443813 is about 3527.5789147799. The cubic root of 12443813 is about 231.7311900969.

The spelling of 12443813 in words is "twelve million, four hundred forty-three thousand, eight hundred thirteen".