13786321 has 2 divisors, whose sum is σ = 13786322. Its totient is φ = 13786320.

The previous prime is 13786313. The next prime is 13786349. The reversal of 13786321 is 12368731.

13786321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9641025 + 4145296 = 3105^2 + 2036^2 .

It is a cyclic number.

It is not a de Polignac number, because 13786321 - 2³ = 13786313 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13786021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6893160 + 6893161.

It is an arithmetic number, because the mean of its divisors is an integer number (6893161).

Almost surely, 2^13786321 is an apocalyptic number.

It is an amenable number.

13786321 is a deficient number, since it is larger than the sum of its proper divisors (1).

13786321 is an equidigital number, since it uses as much as digits as its factorization.

13786321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

The square root of 13786321 is about 3712.9935362185. The cubic root of 13786321 is about 239.7817518239.

The spelling of 13786321 in words is "thirteen million, seven hundred eighty-six thousand, three hundred twenty-one".