12938939 has 4 divisors (see below), whose sum is σ = 13934256. Its totient is φ = 11943624.

The previous prime is 12938923. The next prime is 12938941. The reversal of 12938939 is 93983921.

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

It is a cyclic number.

It is not a de Polignac number, because 12938939 - 2⁴ = 12938923 is a prime.

It is a super-2 number, since 2×12938939² = 334832284891442, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12938939.

It is not an unprimeable number, because it can be changed into a prime (12938239) 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, 497639 + ... + 497664.

It is an arithmetic number, because the mean of its divisors is an integer number (3483564).

Almost surely, 2^12938939 is an apocalyptic number.

12938939 is a deficient number, since it is larger than the sum of its proper divisors (995317).

12938939 is an equidigital number, since it uses as much as digits as its factorization.

12938939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 995316.

The product of its digits is 104976, while the sum is 44.

The square root of 12938939 is about 3597.0736717504. The cubic root of 12938939 is about 234.7647502435.

The spelling of 12938939 in words is "twelve million, nine hundred thirty-eight thousand, nine hundred thirty-nine".