12172423 has 2 divisors, whose sum is σ = 12172424. Its totient is φ = 12172422.

The previous prime is 12172411. The next prime is 12172469. The reversal of 12172423 is 32427121.

It is a weak prime.

It is an emirp because it is prime and its reverse (32427121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12172423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12172394 and 12172403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12172723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6086211 + 6086212.

It is an arithmetic number, because the mean of its divisors is an integer number (6086212).

Almost surely, 2^12172423 is an apocalyptic number.

12172423 is a deficient number, since it is larger than the sum of its proper divisors (1).

12172423 is an equidigital number, since it uses as much as digits as its factorization.

12172423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 672, while the sum is 22.

The square root of 12172423 is about 3488.8999699046. The cubic root of 12172423 is about 230.0341663169.

Adding to 12172423 its reverse (32427121), we get a palindrome (44599544).

The spelling of 12172423 in words is "twelve million, one hundred seventy-two thousand, four hundred twenty-three".