8019797717 has 2 divisors, whose sum is σ = 8019797718. Its totient is φ = 8019797716.

The previous prime is 8019797699. The next prime is 8019797771. The reversal of 8019797717 is 7177979108.

Together with next prime (8019797771) 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., 4439690161 + 3580107556 = 66631^2 + 59834^2 .

It is a cyclic number.

It is not a de Polignac number, because 8019797717 - 2¹⁴ = 8019781333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8019797117) 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, 4009898858 + 4009898859.

It is an arithmetic number, because the mean of its divisors is an integer number (4009898859).

Almost surely, 2^8019797717 is an apocalyptic number.

It is an amenable number.

8019797717 is a deficient number, since it is larger than the sum of its proper divisors (1).

8019797717 is an equidigital number, since it uses as much as digits as its factorization.

8019797717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1555848, while the sum is 56.

The square root of 8019797717 is about 89553.3233163348. The cubic root of 8019797717 is about 2001.6484506819.

The spelling of 8019797717 in words is "eight billion, nineteen million, seven hundred ninety-seven thousand, seven hundred seventeen".