13778147 has 2 divisors, whose sum is σ = 13778148. Its totient is φ = 13778146.

The previous prime is 13778123. The next prime is 13778209. The reversal of 13778147 is 74187731.

It is a weak prime.

It is an emirp because it is prime and its reverse (74187731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13778147 - 2⁸ = 13777891 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13778147.

It is not a weakly prime, because it can be changed into another prime (13775147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6889073 + 6889074.

It is an arithmetic number, because the mean of its divisors is an integer number (6889074).

Almost surely, 2^13778147 is an apocalyptic number.

13778147 is a deficient number, since it is larger than the sum of its proper divisors (1).

13778147 is an equidigital number, since it uses as much as digits as its factorization.

13778147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32928, while the sum is 38.

The square root of 13778147 is about 3711.8926439217. The cubic root of 13778147 is about 239.7343530647.

The spelling of 13778147 in words is "thirteen million, seven hundred seventy-eight thousand, one hundred forty-seven".