12789939 has 4 divisors (see below), whose sum is σ = 17053256. Its totient is φ = 8526624.

The previous prime is 12789919. The next prime is 12789943. The reversal of 12789939 is 93998721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93998721 = 3 ⋅31332907.

It is not a de Polignac number, because 12789939 - 2⁷ = 12789811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12789919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2131654 + ... + 2131659.

It is an arithmetic number, because the mean of its divisors is an integer number (4263314).

Almost surely, 2^12789939 is an apocalyptic number.

12789939 is a deficient number, since it is larger than the sum of its proper divisors (4263317).

12789939 is an equidigital number, since it uses as much as digits as its factorization.

12789939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4263316.

The product of its digits is 244944, while the sum is 48.

The square root of 12789939 is about 3576.3024200982. The cubic root of 12789939 is about 233.8601143619.

It can be divided in two parts, 127899 and 39, that multiplied together give a triangular number (4988061 = T₃₁₅₈).

The spelling of 12789939 in words is "twelve million, seven hundred eighty-nine thousand, nine hundred thirty-nine".