680814647 has 2 divisors, whose sum is σ = 680814648. Its totient is φ = 680814646.

The previous prime is 680814611. The next prime is 680814679. The reversal of 680814647 is 746418086.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 680814647 - 2¹⁸ = 680552503 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 680814598 and 680814607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680814047) 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, 340407323 + 340407324.

It is an arithmetic number, because the mean of its divisors is an integer number (340407324).

Almost surely, 2^680814647 is an apocalyptic number.

680814647 is a deficient number, since it is larger than the sum of its proper divisors (1).

680814647 is an equidigital number, since it uses as much as digits as its factorization.

680814647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 258048, while the sum is 44.

The square root of 680814647 is about 26092.4250885195. The cubic root of 680814647 is about 879.7169574398.

The spelling of 680814647 in words is "six hundred eighty million, eight hundred fourteen thousand, six hundred forty-seven".