13781827 has 2 divisors, whose sum is σ = 13781828. Its totient is φ = 13781826.

The previous prime is 13781777. The next prime is 13781839. The reversal of 13781827 is 72818731.

13781827 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (72818731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13781827 - 2¹⁵ = 13749059 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13781227) 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 as a sum of consecutive naturals, namely, 6890913 + 6890914.

It is an arithmetic number, because the mean of its divisors is an integer number (6890914).

Almost surely, 2^13781827 is an apocalyptic number.

13781827 is a deficient number, since it is larger than the sum of its proper divisors (1).

13781827 is an equidigital number, since it uses as much as digits as its factorization.

13781827 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18816, while the sum is 37.

The square root of 13781827 is about 3712.3883148184. The cubic root of 13781827 is about 239.7556946836.

The spelling of 13781827 in words is "thirteen million, seven hundred eighty-one thousand, eight hundred twenty-seven".