12123623 has 4 divisors (see below), whose sum is σ = 12142680. Its totient is φ = 12104568.

The previous prime is 12123607. The next prime is 12123637. The reversal of 12123623 is 32632121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32632121 = 269 ⋅121309.

It is a cyclic number.

It is not a de Polignac number, because 12123623 - 2⁴ = 12123607 is a prime.

It is a super-2 number, since 2×12123623² = 293964469292258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12123595 and 12123604.

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, 8540 + ... + 9857.

It is an arithmetic number, because the mean of its divisors is an integer number (3035670).

Almost surely, 2^12123623 is an apocalyptic number.

12123623 is a deficient number, since it is larger than the sum of its proper divisors (19057).

12123623 is an equidigital number, since it uses as much as digits as its factorization.

12123623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19056.

The product of its digits is 432, while the sum is 20.

The square root of 12123623 is about 3481.8993380050. The cubic root of 12123623 is about 229.7263475070.

Adding to 12123623 its reverse (32632121), we get a palindrome (44755744).

The spelling of 12123623 in words is "twelve million, one hundred twenty-three thousand, six hundred twenty-three".