12138193 has 2 divisors, whose sum is σ = 12138194. Its totient is φ = 12138192.

The previous prime is 12138163. The next prime is 12138209. The reversal of 12138193 is 39183121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10029889 + 2108304 = 3167^2 + 1452^2 .

It is an emirp because it is prime and its reverse (39183121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12138193 is a prime.

It is not a weakly prime, because it can be changed into another prime (12138103) 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, 6069096 + 6069097.

It is an arithmetic number, because the mean of its divisors is an integer number (6069097).

Almost surely, 2^12138193 is an apocalyptic number.

It is an amenable number.

12138193 is a deficient number, since it is larger than the sum of its proper divisors (1).

12138193 is an equidigital number, since it uses as much as digits as its factorization.

12138193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 28.

The square root of 12138193 is about 3483.9909586565. The cubic root of 12138193 is about 229.8183379662.

The spelling of 12138193 in words is "twelve million, one hundred thirty-eight thousand, one hundred ninety-three".