12939407 has 4 divisors (see below), whose sum is σ = 13934760. Its totient is φ = 11944056.

The previous prime is 12939391. The next prime is 12939449. The reversal of 12939407 is 70493921.

12939407 is digitally balanced in base 2 and base 3, because in such bases 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: 70493921 = 103 ⋅684407.

It is a cyclic number.

It is not a de Polignac number, because 12939407 - 2⁴ = 12939391 is a prime.

It is a Duffinian number.

It is a zygodrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12939457) 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, 497657 + ... + 497682.

It is an arithmetic number, because the mean of its divisors is an integer number (3483690).

Almost surely, 2^12939407 is an apocalyptic number.

12939407 is a deficient number, since it is larger than the sum of its proper divisors (995353).

12939407 is an equidigital number, since it uses as much as digits as its factorization.

12939407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995352.

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

The square root of 12939407 is about 3597.1387240417. The cubic root of 12939407 is about 234.7675806811.

The spelling of 12939407 in words is "twelve million, nine hundred thirty-nine thousand, four hundred seven".