680206447 has 2 divisors, whose sum is σ = 680206448. Its totient is φ = 680206446.

The previous prime is 680206427. The next prime is 680206451. The reversal of 680206447 is 744602086.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 680206447 - 2¹⁵ = 680173679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680206427) 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, 340103223 + 340103224.

It is an arithmetic number, because the mean of its divisors is an integer number (340103224).

Almost surely, 2^680206447 is an apocalyptic number.

680206447 is a deficient number, since it is larger than the sum of its proper divisors (1).

680206447 is an equidigital number, since it uses as much as digits as its factorization.

680206447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 37.

The square root of 680206447 is about 26080.7677609383. The cubic root of 680206447 is about 879.4549168288.

The spelling of 680206447 in words is "six hundred eighty million, two hundred six thousand, four hundred forty-seven".