1996856717 has 2 divisors, whose sum is σ = 1996856718. Its totient is φ = 1996856716.

The previous prime is 1996856707. The next prime is 1996856731. The reversal of 1996856717 is 7176586991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1844358916 + 152497801 = 42946^2 + 12349^2 .

It is a cyclic number.

It is not a de Polignac number, because 1996856717 - 2¹² = 1996852621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1996856707) 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, 998428358 + 998428359.

It is an arithmetic number, because the mean of its divisors is an integer number (998428359).

Almost surely, 2^1996856717 is an apocalyptic number.

It is an amenable number.

1996856717 is a deficient number, since it is larger than the sum of its proper divisors (1).

1996856717 is an equidigital number, since it uses as much as digits as its factorization.

1996856717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5715360, while the sum is 59.

The square root of 1996856717 is about 44686.2027587935. The cubic root of 1996856717 is about 1259.2606557367.

The spelling of 1996856717 in words is "one billion, nine hundred ninety-six million, eight hundred fifty-six thousand, seven hundred seventeen".