12123613 has 4 divisors (see below), whose sum is σ = 12139168. Its totient is φ = 12108060.

The previous prime is 12123607. The next prime is 12123637. The reversal of 12123613 is 31632121.

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 12123613 - 2⁹ = 12123101 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 (12123673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6543 + ... + 8188.

It is an arithmetic number, because the mean of its divisors is an integer number (3034792).

Almost surely, 2^12123613 is an apocalyptic number.

It is an amenable number.

12123613 is a deficient number, since it is larger than the sum of its proper divisors (15555).

12123613 is an equidigital number, since it uses as much as digits as its factorization.

12123613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15554.

The product of its digits is 216, while the sum is 19.

The square root of 12123613 is about 3481.8979020069. The cubic root of 12123613 is about 229.7262843448.

Adding to 12123613 its reverse (31632121), we get a palindrome (43755734).

The spelling of 12123613 in words is "twelve million, one hundred twenty-three thousand, six hundred thirteen".