13778867 has 2 divisors, whose sum is σ = 13778868. Its totient is φ = 13778866.

The previous prime is 13778861. The next prime is 13778903. The reversal of 13778867 is 76887731.

13778867 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (76887731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13778867 - 2⁴ = 13778851 is a prime.

It is not a weakly prime, because it can be changed into another prime (13778861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6889433 + 6889434.

It is an arithmetic number, because the mean of its divisors is an integer number (6889434).

Almost surely, 2^13778867 is an apocalyptic number.

13778867 is a deficient number, since it is larger than the sum of its proper divisors (1).

13778867 is an equidigital number, since it uses as much as digits as its factorization.

13778867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 395136, while the sum is 47.

The square root of 13778867 is about 3711.9896282183. The cubic root of 13778867 is about 239.7385288978.

The spelling of 13778867 in words is "thirteen million, seven hundred seventy-eight thousand, eight hundred sixty-seven".