1680103 has 2 divisors, whose sum is σ = 1680104. Its totient is φ = 1680102.

The previous prime is 1680101. The next prime is 1680121. The reversal of 1680103 is 3010861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1680103 - 2¹ = 1680101 is a prime.

Together with 1680101, it forms a pair of twin primes.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1680101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840051 + 840052.

It is an arithmetic number, because the mean of its divisors is an integer number (840052).

2^1680103 is an apocalyptic number.

1680103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680103 is an equidigital number, since it uses as much as digits as its factorization.

1680103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1680103 is about 1296.1878721852. The cubic root of 1680103 is about 118.8808684658.

Adding to 1680103 its reverse (3010861), we get a palindrome (4690964).

The spelling of 1680103 in words is "one million, six hundred eighty thousand, one hundred three".