1680800773 has 2 divisors, whose sum is σ = 1680800774. Its totient is φ = 1680800772.

The previous prime is 1680800753. The next prime is 1680800777. The reversal of 1680800773 is 3770080861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 934035844 + 746764929 = 30562^2 + 27327^2 .

It is a cyclic number.

It is not a de Polignac number, because 1680800773 - 2⁵ = 1680800741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1680800777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840400386 + 840400387.

It is an arithmetic number, because the mean of its divisors is an integer number (840400387).

Almost surely, 2^1680800773 is an apocalyptic number.

It is an amenable number.

1680800773 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680800773 is an equidigital number, since it uses as much as digits as its factorization.

1680800773 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 1680800773 is about 40997.5703304476. The cubic root of 1680800773 is about 1188.9732388134.

The spelling of 1680800773 in words is "one billion, six hundred eighty million, eight hundred thousand, seven hundred seventy-three".