12381613 has 4 divisors (see below), whose sum is σ = 12919968. Its totient is φ = 11843260.

The previous prime is 12381599. The next prime is 12381641. The reversal of 12381613 is 31618321.

12381613 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12381613 - 2¹⁷ = 12250541 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 (12381113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 269143 + ... + 269188.

It is an arithmetic number, because the mean of its divisors is an integer number (3229992).

Almost surely, 2^12381613 is an apocalyptic number.

It is an amenable number.

12381613 is a deficient number, since it is larger than the sum of its proper divisors (538355).

12381613 is an equidigital number, since it uses as much as digits as its factorization.

12381613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538354.

The product of its digits is 864, while the sum is 25.

The square root of 12381613 is about 3518.7516252216. The cubic root of 12381613 is about 231.3444446951.

Adding to 12381613 its reverse (31618321), we get a palindrome (43999934).

The spelling of 12381613 in words is "twelve million, three hundred eighty-one thousand, six hundred thirteen".