680244361 has 2 divisors, whose sum is σ = 680244362. Its totient is φ = 680244360.

The previous prime is 680244359. The next prime is 680244379. The reversal of 680244361 is 163442086.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 358723600 + 321520761 = 18940^2 + 17931^2 .

It is a cyclic number.

It is not a de Polignac number, because 680244361 - 2¹ = 680244359 is a prime.

Together with 680244359, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (680244311) 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, 340122180 + 340122181.

It is an arithmetic number, because the mean of its divisors is an integer number (340122181).

Almost surely, 2^680244361 is an apocalyptic number.

It is an amenable number.

680244361 is a deficient number, since it is larger than the sum of its proper divisors (1).

680244361 is an equidigital number, since it uses as much as digits as its factorization.

680244361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 680244361 is about 26081.4946082467. The cubic root of 680244361 is about 879.4712564927.

The spelling of 680244361 in words is "six hundred eighty million, two hundred forty-four thousand, three hundred sixty-one".