1680743 has 2 divisors, whose sum is σ = 1680744. Its totient is φ = 1680742.

The previous prime is 1680709. The next prime is 1680761. The reversal of 1680743 is 3470861.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1680743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1680703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840371 + 840372.

It is an arithmetic number, because the mean of its divisors is an integer number (840372).

2^1680743 is an apocalyptic number.

1680743 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680743 is an equidigital number, since it uses as much as digits as its factorization.

1680743 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 1680743 is about 1296.4347264710. The cubic root of 1680743 is about 118.8959616073.

The spelling of 1680743 in words is "one million, six hundred eighty thousand, seven hundred forty-three".