13778071 has 2 divisors, whose sum is σ = 13778072. Its totient is φ = 13778070.

The previous prime is 13778057. The next prime is 13778099. The reversal of 13778071 is 17087731.

It is a weak prime.

It is an emirp because it is prime and its reverse (17087731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13778071 - 2¹¹ = 13776023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13778671) 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, 6889035 + 6889036.

It is an arithmetic number, because the mean of its divisors is an integer number (6889036).

Almost surely, 2^13778071 is an apocalyptic number.

13778071 is a deficient number, since it is larger than the sum of its proper divisors (1).

13778071 is an equidigital number, since it uses as much as digits as its factorization.

13778071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8232, while the sum is 34.

The square root of 13778071 is about 3711.8824065425. The cubic root of 13778071 is about 239.7339122738.

The spelling of 13778071 in words is "thirteen million, seven hundred seventy-eight thousand, seventy-one".