681480647 has 2 divisors, whose sum is σ = 681480648. Its totient is φ = 681480646.

The previous prime is 681480563. The next prime is 681480671. The reversal of 681480647 is 746084186.

681480647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-681480647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 681480598 and 681480607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (681480677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340740323 + 340740324.

It is an arithmetic number, because the mean of its divisors is an integer number (340740324).

Almost surely, 2^681480647 is an apocalyptic number.

681480647 is a deficient number, since it is larger than the sum of its proper divisors (1).

681480647 is an equidigital number, since it uses as much as digits as its factorization.

681480647 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 681480647 is about 26105.1842935460. The cubic root of 681480647 is about 880.0037220056.

The spelling of 681480647 in words is "six hundred eighty-one million, four hundred eighty thousand, six hundred forty-seven".