13813729 has 4 divisors (see below), whose sum is σ = 14047920. Its totient is φ = 13579540.

The previous prime is 13813721. The next prime is 13813733. The reversal of 13813729 is 92731831.

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 13813729 - 2³ = 13813721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13813694 and 13813703.

It is not an unprimeable number, because it can be changed into a prime (13813721) 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, 117007 + ... + 117124.

It is an arithmetic number, because the mean of its divisors is an integer number (3511980).

Almost surely, 2^13813729 is an apocalyptic number.

It is an amenable number.

13813729 is a deficient number, since it is larger than the sum of its proper divisors (234191).

13813729 is an equidigital number, since it uses as much as digits as its factorization.

13813729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234190.

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

The square root of 13813729 is about 3716.6825261246. The cubic root of 13813729 is about 239.9405466159.

The spelling of 13813729 in words is "thirteen million, eight hundred thirteen thousand, seven hundred twenty-nine".