12616729 has 4 divisors (see below), whose sum is σ = 12758580. Its totient is φ = 12474880.

The previous prime is 12616697. The next prime is 12616733. The reversal of 12616729 is 92761621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92761621 = 43 ⋅2157247.

It can be written as a sum of positive squares in 2 ways, for example, as 2408704 + 10208025 = 1552^2 + 3195^2 .

It is a cyclic number.

It is not a de Polignac number, because 12616729 - 2⁵ = 12616697 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12616694 and 12616703.

It is not an unprimeable number, because it can be changed into a prime (12616739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70792 + ... + 70969.

It is an arithmetic number, because the mean of its divisors is an integer number (3189645).

Almost surely, 2^12616729 is an apocalyptic number.

It is an amenable number.

12616729 is a deficient number, since it is larger than the sum of its proper divisors (141851).

12616729 is an equidigital number, since it uses as much as digits as its factorization.

12616729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141850.

The product of its digits is 9072, while the sum is 34.

The square root of 12616729 is about 3552.0035191424. The cubic root of 12616729 is about 232.7996152712.

The spelling of 12616729 in words is "twelve million, six hundred sixteen thousand, seven hundred twenty-nine".