1685713 has 2 divisors, whose sum is σ = 1685714. Its totient is φ = 1685712.

The previous prime is 1685711. The next prime is 1685731. The reversal of 1685713 is 3175861.

Together with next prime (1685731) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1364224 + 321489 = 1168^2 + 567^2 .

It is a cyclic number.

It is not a de Polignac number, because 1685713 - 2¹ = 1685711 is a prime.

Together with 1685711, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1685711) 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, 842856 + 842857.

It is an arithmetic number, because the mean of its divisors is an integer number (842857).

2^1685713 is an apocalyptic number.

It is an amenable number.

1685713 is a deficient number, since it is larger than the sum of its proper divisors (1).

1685713 is an equidigital number, since it uses as much as digits as its factorization.

1685713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 31.

The square root of 1685713 is about 1298.3501068664. The cubic root of 1685713 is about 119.0130390815.

The spelling of 1685713 in words is "one million, six hundred eighty-five thousand, seven hundred thirteen".