12939807 has 4 divisors (see below), whose sum is σ = 17253080. Its totient is φ = 8626536.

The previous prime is 12939793. The next prime is 12939811. The reversal of 12939807 is 70893921.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12939807 - 2²³ = 4551199 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 (12939827) 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, 2156632 + ... + 2156637.

It is an arithmetic number, because the mean of its divisors is an integer number (4313270).

Almost surely, 2^12939807 is an apocalyptic number.

12939807 is a deficient number, since it is larger than the sum of its proper divisors (4313273).

12939807 is an equidigital number, since it uses as much as digits as its factorization.

12939807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4313272.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 12939807 is about 3597.1943233581. The cubic root of 12939807 is about 234.7699998045.

The spelling of 12939807 in words is "twelve million, nine hundred thirty-nine thousand, eight hundred seven".