1668683 has 2 divisors, whose sum is σ = 1668684. Its totient is φ = 1668682.

The previous prime is 1668679. The next prime is 1668721. The reversal of 1668683 is 3868661.

It is an a-pointer prime, because the next prime (1668721) can be obtained adding 1668683 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1668683 - 2² = 1668679 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1668083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834341 + 834342.

It is an arithmetic number, because the mean of its divisors is an integer number (834342).

2^1668683 is an apocalyptic number.

1668683 is a deficient number, since it is larger than the sum of its proper divisors (1).

1668683 is an equidigital number, since it uses as much as digits as its factorization.

1668683 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 38.

The square root of 1668683 is about 1291.7751352306. The cubic root of 1668683 is about 118.6109034316.

The spelling of 1668683 in words is "one million, six hundred sixty-eight thousand, six hundred eighty-three".