12138223 has 2 divisors, whose sum is σ = 12138224. Its totient is φ = 12138222.

The previous prime is 12138209. The next prime is 12138229. The reversal of 12138223 is 32283121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12138223 - 2²¹ = 10041071 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12138194 and 12138203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12138229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6069111 + 6069112.

It is an arithmetic number, because the mean of its divisors is an integer number (6069112).

Almost surely, 2^12138223 is an apocalyptic number.

12138223 is a deficient number, since it is larger than the sum of its proper divisors (1).

12138223 is an equidigital number, since it uses as much as digits as its factorization.

12138223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 22.

The square root of 12138223 is about 3483.9952640611. The cubic root of 12138223 is about 229.8185273010.

The spelling of 12138223 in words is "twelve million, one hundred thirty-eight thousand, two hundred twenty-three".