78971204111 has 2 divisors, whose sum is σ = 78971204112. Its totient is φ = 78971204110.

The previous prime is 78971204051. The next prime is 78971204113. The reversal of 78971204111 is 11140217987.

It is a strong prime.

It is an emirp because it is prime and its reverse (11140217987) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78971204111 - 2¹⁴ = 78971187727 is a prime.

Together with 78971204113, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78971204113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39485602055 + 39485602056.

It is an arithmetic number, because the mean of its divisors is an integer number (39485602056).

Almost surely, 2^78971204111 is an apocalyptic number.

78971204111 is a deficient number, since it is larger than the sum of its proper divisors (1).

78971204111 is an equidigital number, since it uses as much as digits as its factorization.

78971204111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 41.

The spelling of 78971204111 in words is "seventy-eight billion, nine hundred seventy-one million, two hundred four thousand, one hundred eleven".