12390023 has 4 divisors (see below), whose sum is σ = 12434088. Its totient is φ = 12345960.

The previous prime is 12390019. The next prime is 12390029. The reversal of 12390023 is 32009321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32009321 = 97 ⋅329993.

It is a cyclic number.

It is not a de Polignac number, because 12390023 - 2² = 12390019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12389977 and 12390004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12390029) 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, 21608 + ... + 22173.

It is an arithmetic number, because the mean of its divisors is an integer number (3108522).

Almost surely, 2^12390023 is an apocalyptic number.

12390023 is a deficient number, since it is larger than the sum of its proper divisors (44065).

12390023 is an equidigital number, since it uses as much as digits as its factorization.

12390023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44064.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 12390023 is about 3519.9464484563. The cubic root of 12390023 is about 231.3968117666.

Adding to 12390023 its reverse (32009321), we get a palindrome (44399344).

The spelling of 12390023 in words is "twelve million, three hundred ninety thousand, twenty-three".