680068513 has 2 divisors, whose sum is σ = 680068514. Its totient is φ = 680068512.

The previous prime is 680068507. The next prime is 680068573. The reversal of 680068513 is 315860086.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 679279969 + 788544 = 26063^2 + 888^2 .

It is a cyclic number.

It is not a de Polignac number, because 680068513 - 2⁹ = 680068001 is a prime.

It is not a weakly prime, because it can be changed into another prime (680068573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340034256 + 340034257.

It is an arithmetic number, because the mean of its divisors is an integer number (340034257).

Almost surely, 2^680068513 is an apocalyptic number.

It is an amenable number.

680068513 is a deficient number, since it is larger than the sum of its proper divisors (1).

680068513 is an equidigital number, since it uses as much as digits as its factorization.

680068513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 680068513 is about 26078.1232645296. The cubic root of 680068513 is about 879.3954667723.

The spelling of 680068513 in words is "six hundred eighty million, sixty-eight thousand, five hundred thirteen".