12439023 has 4 divisors (see below), whose sum is σ = 16585368. Its totient is φ = 8292680.

The previous prime is 12439013. The next prime is 12439039. The reversal of 12439023 is 32093421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32093421 = 3 ⋅10697807.

It is a cyclic number.

It is not a de Polignac number, because 12439023 - 2⁹ = 12438511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12438984 and 12439002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12439003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2073168 + ... + 2073173.

It is an arithmetic number, because the mean of its divisors is an integer number (4146342).

Almost surely, 2^12439023 is an apocalyptic number.

12439023 is a deficient number, since it is larger than the sum of its proper divisors (4146345).

12439023 is an equidigital number, since it uses as much as digits as its factorization.

12439023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4146344.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 12439023 is about 3526.8999135218. The cubic root of 12439023 is about 231.7014528330.

The spelling of 12439023 in words is "twelve million, four hundred thirty-nine thousand, twenty-three".