12791729 has 4 divisors (see below), whose sum is σ = 12810240. Its totient is φ = 12773220.

The previous prime is 12791687. The next prime is 12791773. The reversal of 12791729 is 92719721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12791729 - 2¹² = 12787633 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12791692 and 12791701.

It is not an unprimeable number, because it can be changed into a prime (12791789) 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, 8177 + ... + 9614.

It is an arithmetic number, because the mean of its divisors is an integer number (3202560).

Almost surely, 2^12791729 is an apocalyptic number.

It is an amenable number.

12791729 is a deficient number, since it is larger than the sum of its proper divisors (18511).

12791729 is an equidigital number, since it uses as much as digits as its factorization.

12791729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18510.

The product of its digits is 15876, while the sum is 38.

The square root of 12791729 is about 3576.5526698205. The cubic root of 12791729 is about 233.8710237201.

The spelling of 12791729 in words is "twelve million, seven hundred ninety-one thousand, seven hundred twenty-nine".