78789898807 has 2 divisors, whose sum is σ = 78789898808. Its totient is φ = 78789898806.

The previous prime is 78789898777. The next prime is 78789898829. The reversal of 78789898807 is 70889898787.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78789898807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78789898867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39394949403 + 39394949404.

It is an arithmetic number, because the mean of its divisors is an integer number (39394949404).

Almost surely, 2^78789898807 is an apocalyptic number.

78789898807 is a deficient number, since it is larger than the sum of its proper divisors (1).

78789898807 is an equidigital number, since it uses as much as digits as its factorization.

78789898807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 910393344, while the sum is 79.

The spelling of 78789898807 in words is "seventy-eight billion, seven hundred eighty-nine million, eight hundred ninety-eight thousand, eight hundred seven".