680456839 has 2 divisors, whose sum is σ = 680456840. Its totient is φ = 680456838.

The previous prime is 680456797. The next prime is 680456911. The reversal of 680456839 is 938654086.

It is a happy number.

680456839 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 680456839 - 2¹¹ = 680454791 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 680456792 and 680456801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680457839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340228419 + 340228420.

It is an arithmetic number, because the mean of its divisors is an integer number (340228420).

Almost surely, 2^680456839 is an apocalyptic number.

680456839 is a deficient number, since it is larger than the sum of its proper divisors (1).

680456839 is an equidigital number, since it uses as much as digits as its factorization.

680456839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1244160, while the sum is 49.

The square root of 680456839 is about 26085.5676380638. The cubic root of 680456839 is about 879.5628161592.

The spelling of 680456839 in words is "six hundred eighty million, four hundred fifty-six thousand, eight hundred thirty-nine".