680630443 has 2 divisors, whose sum is σ = 680630444. Its totient is φ = 680630442.

The previous prime is 680630441. The next prime is 680630471. The reversal of 680630443 is 344036086.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 680630443 - 2¹ = 680630441 is a prime.

Together with 680630441, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 680630399 and 680630408.

It is not a weakly prime, because it can be changed into another prime (680630441) 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, 340315221 + 340315222.

It is an arithmetic number, because the mean of its divisors is an integer number (340315222).

Almost surely, 2^680630443 is an apocalyptic number.

680630443 is a deficient number, since it is larger than the sum of its proper divisors (1).

680630443 is an equidigital number, since it uses as much as digits as its factorization.

680630443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 680630443 is about 26088.8950130127. The cubic root of 680630443 is about 879.6376103419.

It can be divided in two parts, 6806 and 30443, that added together give a square (37249 = 193²).

The spelling of 680630443 in words is "six hundred eighty million, six hundred thirty thousand, four hundred forty-three".