13783729 has 4 divisors (see below), whose sum is σ = 14259060. Its totient is φ = 13308400.

The previous prime is 13783723. The next prime is 13783741. The reversal of 13783729 is 92738731.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9486400 + 4297329 = 3080^2 + 2073^2 .

It is a cyclic number.

It is not a de Polignac number, because 13783729 - 2¹¹ = 13781681 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13783691 and 13783700.

It is not an unprimeable number, because it can be changed into a prime (13783723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237622 + ... + 237679.

It is an arithmetic number, because the mean of its divisors is an integer number (3564765).

Almost surely, 2^13783729 is an apocalyptic number.

It is an amenable number.

13783729 is a deficient number, since it is larger than the sum of its proper divisors (475331).

13783729 is an equidigital number, since it uses as much as digits as its factorization.

13783729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475330.

The product of its digits is 63504, while the sum is 40.

The square root of 13783729 is about 3712.6444753033. The cubic root of 13783729 is about 239.7667235637.

The spelling of 13783729 in words is "thirteen million, seven hundred eighty-three thousand, seven hundred twenty-nine".