12113613 has 6 divisors (see below), whose sum is σ = 17497454. Its totient is φ = 8075736.

The previous prime is 12113599. The next prime is 12113657. The reversal of 12113613 is 31631121.

12113613 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 10323369 + 1790244 = 3213^2 + 1338^2 .

It is not a de Polignac number, because 12113613 - 2⁴ = 12113597 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 (12113813) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 672970 + ... + 672987.

Almost surely, 2^12113613 is an apocalyptic number.

It is an amenable number.

12113613 is a deficient number, since it is larger than the sum of its proper divisors (5383841).

12113613 is a wasteful number, since it uses less digits than its factorization.

12113613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345963 (or 1345960 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 12113613 is about 3480.4616073159. The cubic root of 12113613 is about 229.6631047532.

Adding to 12113613 its reverse (31631121), we get a palindrome (43744734).

The spelling of 12113613 in words is "twelve million, one hundred thirteen thousand, six hundred thirteen".