680240653 has 2 divisors, whose sum is σ = 680240654. Its totient is φ = 680240652.

The previous prime is 680240629. The next prime is 680240681. The reversal of 680240653 is 356042086.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 373185124 + 307055529 = 19318^2 + 17523^2 .

It is a cyclic number.

It is not a de Polignac number, because 680240653 - 2⁵ = 680240621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680240683) 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, 340120326 + 340120327.

It is an arithmetic number, because the mean of its divisors is an integer number (340120327).

Almost surely, 2^680240653 is an apocalyptic number.

It is an amenable number.

680240653 is a deficient number, since it is larger than the sum of its proper divisors (1).

680240653 is an equidigital number, since it uses as much as digits as its factorization.

680240653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 680240653 is about 26081.4235232665. The cubic root of 680240653 is about 879.4696584957.

The spelling of 680240653 in words is "six hundred eighty million, two hundred forty thousand, six hundred fifty-three".