1681703 has 2 divisors, whose sum is σ = 1681704. Its totient is φ = 1681702.

The previous prime is 1681679. The next prime is 1681711. The reversal of 1681703 is 3071861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1681703 - 2⁶ = 1681639 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1681723) 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, 840851 + 840852.

It is an arithmetic number, because the mean of its divisors is an integer number (840852).

2^1681703 is an apocalyptic number.

1681703 is a deficient number, since it is larger than the sum of its proper divisors (1).

1681703 is an equidigital number, since it uses as much as digits as its factorization.

1681703 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 1681703 is about 1296.8049197933. The cubic root of 1681703 is about 118.9185941372.

It can be divided in two parts, 168170 and 3, that multiplied together give a triangular number (504510 = T₁₀₀₄).

The spelling of 1681703 in words is "one million, six hundred eighty-one thousand, seven hundred three".