12138613 has 2 divisors, whose sum is σ = 12138614. Its totient is φ = 12138612.

The previous prime is 12138593. The next prime is 12138631. The reversal of 12138613 is 31683121.

Together with next prime (12138631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9998244 + 2140369 = 3162^2 + 1463^2 .

It is a cyclic number.

It is not a de Polignac number, because 12138613 - 2²¹ = 10041461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12138673) 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 as a sum of consecutive naturals, namely, 6069306 + 6069307.

It is an arithmetic number, because the mean of its divisors is an integer number (6069307).

Almost surely, 2^12138613 is an apocalyptic number.

It is an amenable number.

12138613 is a deficient number, since it is larger than the sum of its proper divisors (1).

12138613 is an equidigital number, since it uses as much as digits as its factorization.

12138613 is an odious number, because the sum of its binary digits is odd.

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

The square root of 12138613 is about 3484.0512338368. The cubic root of 12138613 is about 229.8209886240.

The spelling of 12138613 in words is "twelve million, one hundred thirty-eight thousand, six hundred thirteen".