13756729 has 4 divisors (see below), whose sum is σ = 15721984. Its totient is φ = 11791476.

The previous prime is 13756709. The next prime is 13756739. The reversal of 13756729 is 92765731.

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 13756729 - 2⁵ = 13756697 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13756691 and 13756700.

It is not an unprimeable number, because it can be changed into a prime (13756709) 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, 982617 + ... + 982630.

It is an arithmetic number, because the mean of its divisors is an integer number (3930496).

Almost surely, 2^13756729 is an apocalyptic number.

It is an amenable number.

13756729 is a deficient number, since it is larger than the sum of its proper divisors (1965255).

13756729 is an equidigital number, since it uses as much as digits as its factorization.

13756729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1965254.

The product of its digits is 79380, while the sum is 40.

The square root of 13756729 is about 3709.0064707412. The cubic root of 13756729 is about 239.6100670425.

The spelling of 13756729 in words is "thirteen million, seven hundred fifty-six thousand, seven hundred twenty-nine".