1680803 has 2 divisors, whose sum is σ = 1680804. Its totient is φ = 1680802.

The previous prime is 1680793. The next prime is 1680821. The reversal of 1680803 is 3080861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1680803 - 2⁴ = 1680787 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1680823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840401 + 840402.

It is an arithmetic number, because the mean of its divisors is an integer number (840402).

2^1680803 is an apocalyptic number.

1680803 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680803 is an equidigital number, since it uses as much as digits as its factorization.

1680803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 1680803 is about 1296.4578666505. The cubic root of 1680803 is about 118.8973763929.

The spelling of 1680803 in words is "one million, six hundred eighty thousand, eight hundred three".