680559101 has 2 divisors, whose sum is σ = 680559102. Its totient is φ = 680559100.

The previous prime is 680559083. The next prime is 680559137. The reversal of 680559101 is 101955086.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 650199001 + 30360100 = 25499^2 + 5510^2 .

It is a cyclic number.

It is not a de Polignac number, because 680559101 - 2¹⁰ = 680558077 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680559161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340279550 + 340279551.

It is an arithmetic number, because the mean of its divisors is an integer number (340279551).

Almost surely, 2^680559101 is an apocalyptic number.

It is an amenable number.

680559101 is a deficient number, since it is larger than the sum of its proper divisors (1).

680559101 is an equidigital number, since it uses as much as digits as its factorization.

680559101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 35.

The square root of 680559101 is about 26087.5276904501. The cubic root of 680559101 is about 879.6068754549.

The spelling of 680559101 in words is "six hundred eighty million, five hundred fifty-nine thousand, one hundred one".