680800849 has 2 divisors, whose sum is σ = 680800850. Its totient is φ = 680800848.

The previous prime is 680800831. The next prime is 680800867. The reversal of 680800849 is 948008086.

It is a balanced prime because it is at equal distance from previous prime (680800831) and next prime (680800867).

It can be written as a sum of positive squares in only one way, i.e., 547560000 + 133240849 = 23400^2 + 11543^2 .

It is a cyclic number.

It is not a de Polignac number, because 680800849 - 2¹¹ = 680798801 is a prime.

It is not a weakly prime, because it can be changed into another prime (680800829) 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, 340400424 + 340400425.

It is an arithmetic number, because the mean of its divisors is an integer number (340400425).

Almost surely, 2^680800849 is an apocalyptic number.

It is an amenable number.

680800849 is a deficient number, since it is larger than the sum of its proper divisors (1).

680800849 is an equidigital number, since it uses as much as digits as its factorization.

680800849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 110592, while the sum is 43.

The square root of 680800849 is about 26092.1606809402. The cubic root of 680800849 is about 879.7110143555.

The spelling of 680800849 in words is "six hundred eighty million, eight hundred thousand, eight hundred forty-nine".