12938791 has 4 divisors (see below), whose sum is σ = 13619800. Its totient is φ = 12257784.

The previous prime is 12938767. The next prime is 12938801. The reversal of 12938791 is 19783921.

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 12938791 - 2⁷ = 12938663 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 (12938711) 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, 340476 + ... + 340513.

It is an arithmetic number, because the mean of its divisors is an integer number (3404950).

Almost surely, 2^12938791 is an apocalyptic number.

12938791 is a deficient number, since it is larger than the sum of its proper divisors (681009).

12938791 is an equidigital number, since it uses as much as digits as its factorization.

12938791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681008.

The product of its digits is 27216, while the sum is 40.

The square root of 12938791 is about 3597.0530994135. The cubic root of 12938791 is about 234.7638551337.

The spelling of 12938791 in words is "twelve million, nine hundred thirty-eight thousand, seven hundred ninety-one".