680889317 has 2 divisors, whose sum is σ = 680889318. Its totient is φ = 680889316.

The previous prime is 680889311. The next prime is 680889331. The reversal of 680889317 is 713988086.

It is a happy number.

680889317 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 can be written as a sum of positive squares in only one way, i.e., 596873761 + 84015556 = 24431^2 + 9166^2 .

It is a cyclic number.

It is not a de Polignac number, because 680889317 - 2¹⁰ = 680888293 is a prime.

It is a super-2 number, since 2×680889317² = 927220524009452978, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680889311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340444658 + 340444659.

It is an arithmetic number, because the mean of its divisors is an integer number (340444659).

Almost surely, 2^680889317 is an apocalyptic number.

It is an amenable number.

680889317 is a deficient number, since it is larger than the sum of its proper divisors (1).

680889317 is an equidigital number, since it uses as much as digits as its factorization.

680889317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 580608, while the sum is 50.

The square root of 680889317 is about 26093.8559243359. The cubic root of 680889317 is about 879.7491179621.

The spelling of 680889317 in words is "six hundred eighty million, eight hundred eighty-nine thousand, three hundred seventeen".