12279923 has 4 divisors (see below), whose sum is σ = 12322128. Its totient is φ = 12237720.

The previous prime is 12279919. The next prime is 12279959. The reversal of 12279923 is 32997221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32997221 = 17 ⋅1941013.

It is a cyclic number.

It is not a de Polignac number, because 12279923 - 2² = 12279919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12279973) 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, 20663 + ... + 21248.

It is an arithmetic number, because the mean of its divisors is an integer number (3080532).

Almost surely, 2^12279923 is an apocalyptic number.

12279923 is a deficient number, since it is larger than the sum of its proper divisors (42205).

12279923 is an equidigital number, since it uses as much as digits as its factorization.

12279923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42204.

The product of its digits is 13608, while the sum is 35.

The square root of 12279923 is about 3504.2721070145. The cubic root of 12279923 is about 230.7093600554.

The spelling of 12279923 in words is "twelve million, two hundred seventy-nine thousand, nine hundred twenty-three".