1682809 has 2 divisors, whose sum is σ = 1682810. Its totient is φ = 1682808.

The previous prime is 1682801. The next prime is 1682827. The reversal of 1682809 is 9082861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1432809 + 250000 = 1197^2 + 500^2 .

It is a cyclic number.

It is not a de Polignac number, because 1682809 - 2³ = 1682801 is a prime.

It is a super-2 number, since 2×1682809² = 5663692260962, which contains 22 as substring.

1682809 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1682801) 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, 841404 + 841405.

It is an arithmetic number, because the mean of its divisors is an integer number (841405).

2^1682809 is an apocalyptic number.

It is an amenable number.

1682809 is a deficient number, since it is larger than the sum of its proper divisors (1).

1682809 is an equidigital number, since it uses as much as digits as its factorization.

1682809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 1682809 is about 1297.2312823857. The cubic root of 1682809 is about 118.9446580226.

The spelling of 1682809 in words is "one million, six hundred eighty-two thousand, eight hundred nine".