12997423 has 4 divisors (see below), whose sum is σ = 13445640. Its totient is φ = 12549208.

The previous prime is 12997421. The next prime is 12997433. The reversal of 12997423 is 32479921.

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 12997423 - 2¹ = 12997421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12997421) 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, 224065 + ... + 224122.

It is an arithmetic number, because the mean of its divisors is an integer number (3361410).

Almost surely, 2^12997423 is an apocalyptic number.

12997423 is a deficient number, since it is larger than the sum of its proper divisors (448217).

12997423 is an equidigital number, since it uses as much as digits as its factorization.

12997423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448216.

The product of its digits is 27216, while the sum is 37.

The square root of 12997423 is about 3605.1938921506. The cubic root of 12997423 is about 235.1179308492.

The spelling of 12997423 in words is "twelve million, nine hundred ninety-seven thousand, four hundred twenty-three".