12613729 has 4 divisors (see below), whose sum is σ = 13162176. Its totient is φ = 12065284.

The previous prime is 12613721. The next prime is 12613823. The reversal of 12613729 is 92731621.

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, and also an emirpimes, since its reverse is a distinct semiprime: 92731621 = 103 ⋅900307.

It is a cyclic number.

It is not a de Polignac number, because 12613729 - 2³ = 12613721 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 12613729.

It is not an unprimeable number, because it can be changed into a prime (12613721) 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, 274189 + ... + 274234.

It is an arithmetic number, because the mean of its divisors is an integer number (3290544).

Almost surely, 2^12613729 is an apocalyptic number.

It is an amenable number.

12613729 is a deficient number, since it is larger than the sum of its proper divisors (548447).

12613729 is an equidigital number, since it uses as much as digits as its factorization.

12613729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548446.

The product of its digits is 4536, while the sum is 31.

The square root of 12613729 is about 3551.5811971571. The cubic root of 12613729 is about 232.7811621468.

The spelling of 12613729 in words is "twelve million, six hundred thirteen thousand, seven hundred twenty-nine".