78749195093 has 2 divisors, whose sum is σ = 78749195094. Its totient is φ = 78749195092.

The previous prime is 78749195039. The next prime is 78749195167. The reversal of 78749195093 is 39059194787.

Together with previous prime (78749195039) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64463686609 + 14285508484 = 253897^2 + 119522^2 .

It is a cyclic number.

It is not a de Polignac number, because 78749195093 - 2⁸ = 78749194837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78749195033) 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, 39374597546 + 39374597547.

It is an arithmetic number, because the mean of its divisors is an integer number (39374597547).

Almost surely, 2^78749195093 is an apocalyptic number.

It is an amenable number.

78749195093 is a deficient number, since it is larger than the sum of its proper divisors (1).

78749195093 is an equidigital number, since it uses as much as digits as its factorization.

78749195093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17146080, while the sum is 62.

The spelling of 78749195093 in words is "seventy-eight billion, seven hundred forty-nine million, one hundred ninety-five thousand, ninety-three".