680796617 has 2 divisors, whose sum is σ = 680796618. Its totient is φ = 680796616.

The previous prime is 680796601. The next prime is 680796629. The reversal of 680796617 is 716697086.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 488807881 + 191988736 = 22109^2 + 13856^2 .

It is a cyclic number.

It is not a de Polignac number, because 680796617 - 2⁴ = 680796601 is a prime.

It is not a weakly prime, because it can be changed into another prime (680796667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340398308 + 340398309.

It is an arithmetic number, because the mean of its divisors is an integer number (340398309).

Almost surely, 2^680796617 is an apocalyptic number.

It is an amenable number.

680796617 is a deficient number, since it is larger than the sum of its proper divisors (1).

680796617 is an equidigital number, since it uses as much as digits as its factorization.

680796617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 50.

The square root of 680796617 is about 26092.0795836591. The cubic root of 680796617 is about 879.7091915293.

The spelling of 680796617 in words is "six hundred eighty million, seven hundred ninety-six thousand, six hundred seventeen".