12438813 has 8 divisors (see below), whose sum is σ = 16610176. Its totient is φ = 8280000.

The previous prime is 12438809. The next prime is 12438817. The reversal of 12438813 is 31883421.

It is an interprime number because it is at equal distance from previous prime (12438809) and next prime (12438817).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12438813 - 2² = 12438809 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 (12438817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 508 + ... + 5013.

It is an arithmetic number, because the mean of its divisors is an integer number (2076272).

Almost surely, 2^12438813 is an apocalyptic number.

It is an amenable number.

12438813 is a deficient number, since it is larger than the sum of its proper divisors (4171363).

12438813 is an equidigital number, since it uses as much as digits as its factorization.

12438813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6275.

The product of its digits is 4608, while the sum is 30.

The square root of 12438813 is about 3526.8701422082. The cubic root of 12438813 is about 231.7001489369.

The spelling of 12438813 in words is "twelve million, four hundred thirty-eight thousand, eight hundred thirteen".