12917423 has 4 divisors (see below), whose sum is σ = 13094448. Its totient is φ = 12740400.

The previous prime is 12917389. The next prime is 12917431. The reversal of 12917423 is 32471921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12917423 - 2⁸ = 12917167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12917453) 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 in 3 ways as a sum of consecutive naturals, for example, 88403 + ... + 88548.

It is an arithmetic number, because the mean of its divisors is an integer number (3273612).

Almost surely, 2^12917423 is an apocalyptic number.

12917423 is a deficient number, since it is larger than the sum of its proper divisors (177025).

12917423 is an equidigital number, since it uses as much as digits as its factorization.

12917423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177024.

The product of its digits is 3024, while the sum is 29.

The square root of 12917423 is about 3594.0816629565. The cubic root of 12917423 is about 234.6345489235.

The spelling of 12917423 in words is "twelve million, nine hundred seventeen thousand, four hundred twenty-three".