13728133 has 4 divisors (see below), whose sum is σ = 14171008. Its totient is φ = 13285260.

The previous prime is 13728109. The next prime is 13728139. The reversal of 13728133 is 33182731.

13728133 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 33182731 = 4073 ⋅8147.

It is a cyclic number.

It is not a de Polignac number, because 13728133 - 2⁵ = 13728101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13728139) 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, 221391 + ... + 221452.

It is an arithmetic number, because the mean of its divisors is an integer number (3542752).

Almost surely, 2^13728133 is an apocalyptic number.

It is an amenable number.

13728133 is a deficient number, since it is larger than the sum of its proper divisors (442875).

13728133 is an equidigital number, since it uses as much as digits as its factorization.

13728133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442874.

The product of its digits is 3024, while the sum is 28.

The square root of 13728133 is about 3705.1495246481. The cubic root of 13728133 is about 239.4439267092.

It can be divided in two parts, 13728 and 133, that added together give a triangular number (13861 = T₁₆₆).

The spelling of 13728133 in words is "thirteen million, seven hundred twenty-eight thousand, one hundred thirty-three".