680707477 has 2 divisors, whose sum is σ = 680707478. Its totient is φ = 680707476.

The previous prime is 680707429. The next prime is 680707481. The reversal of 680707477 is 774707086.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 628304356 + 52403121 = 25066^2 + 7239^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-680707477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680707487) 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, 340353738 + 340353739.

It is an arithmetic number, because the mean of its divisors is an integer number (340353739).

Almost surely, 2^680707477 is an apocalyptic number.

It is an amenable number.

680707477 is a deficient number, since it is larger than the sum of its proper divisors (1).

680707477 is an equidigital number, since it uses as much as digits as its factorization.

680707477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 460992, while the sum is 46.

The square root of 680707477 is about 26090.3713465332. The cubic root of 680707477 is about 879.6707949910.

The spelling of 680707477 in words is "six hundred eighty million, seven hundred seven thousand, four hundred seventy-seven".