13788331 has 4 divisors (see below), whose sum is σ = 13797000. Its totient is φ = 13779664.

The previous prime is 13788329. The next prime is 13788347. The reversal of 13788331 is 13388731.

13788331 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 brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 13388731 = 449 ⋅29819.

It is a cyclic number.

It is not a de Polignac number, because 13788331 - 2¹ = 13788329 is a prime.

It is a super-2 number, since 2×13788331² = 380236143531122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13788361) 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, 1186 + ... + 5383.

It is an arithmetic number, because the mean of its divisors is an integer number (3449250).

Almost surely, 2^13788331 is an apocalyptic number.

13788331 is a deficient number, since it is larger than the sum of its proper divisors (8669).

13788331 is an equidigital number, since it uses as much as digits as its factorization.

13788331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8668.

The product of its digits is 12096, while the sum is 34.

The square root of 13788331 is about 3713.2641974414. The cubic root of 13788331 is about 239.7934043863.

The spelling of 13788331 in words is "thirteen million, seven hundred eighty-eight thousand, three hundred thirty-one".