12939623 has 4 divisors (see below), whose sum is σ = 12980760. Its totient is φ = 12898488.

The previous prime is 12939613. The next prime is 12939637. The reversal of 12939623 is 32693921.

12939623 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32693921 = 13 ⋅2514917.

It is a cyclic number.

It is not a de Polignac number, because 12939623 - 2¹⁶ = 12874087 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 (12939613) 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, 20093 + ... + 20726.

It is an arithmetic number, because the mean of its divisors is an integer number (3245190).

Almost surely, 2^12939623 is an apocalyptic number.

12939623 is a deficient number, since it is larger than the sum of its proper divisors (41137).

12939623 is an equidigital number, since it uses as much as digits as its factorization.

12939623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41136.

The product of its digits is 17496, while the sum is 35.

The square root of 12939623 is about 3597.1687477793. The cubic root of 12939623 is about 234.7688870139.

The spelling of 12939623 in words is "twelve million, nine hundred thirty-nine thousand, six hundred twenty-three".