78710791 has 2 divisors, whose sum is σ = 78710792. Its totient is φ = 78710790.

The previous prime is 78710789. The next prime is 78710837. The reversal of 78710791 is 19701787.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78710791 - 2¹ = 78710789 is a prime.

Together with 78710789, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78710701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39355395 + 39355396.

It is an arithmetic number, because the mean of its divisors is an integer number (39355396).

Almost surely, 2^78710791 is an apocalyptic number.

78710791 is a deficient number, since it is larger than the sum of its proper divisors (1).

78710791 is an equidigital number, since it uses as much as digits as its factorization.

78710791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24696, while the sum is 40.

The square root of 78710791 is about 8871.9102227198. The cubic root of 78710791 is about 428.5597949911.

The spelling of 78710791 in words is "seventy-eight million, seven hundred ten thousand, seven hundred ninety-one".