12791739 has 4 divisors (see below), whose sum is σ = 17055656. Its totient is φ = 8527824.

The previous prime is 12791687. The next prime is 12791773. The reversal of 12791739 is 93719721.

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

It is not a de Polignac number, because 12791739 - 2⁸ = 12791483 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12791697 and 12791706.

It is not an unprimeable number, because it can be changed into a prime (12791789) 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, 2131954 + ... + 2131959.

It is an arithmetic number, because the mean of its divisors is an integer number (4263914).

Almost surely, 2^12791739 is an apocalyptic number.

12791739 is a deficient number, since it is larger than the sum of its proper divisors (4263917).

12791739 is an equidigital number, since it uses as much as digits as its factorization.

12791739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4263916.

The product of its digits is 23814, while the sum is 39.

The square root of 12791739 is about 3576.5540678144. The cubic root of 12791739 is about 233.8710846634.

It can be divided in two parts, 12791 and 739, that multiplied together give a palindrome (9452549).

The spelling of 12791739 in words is "twelve million, seven hundred ninety-one thousand, seven hundred thirty-nine".