1681711 has 2 divisors, whose sum is σ = 1681712. Its totient is φ = 1681710.

The previous prime is 1681703. The next prime is 1681717. The reversal of 1681711 is 1171861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1681711 - 2³ = 1681703 is a prime.

1681711 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1681717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840855 + 840856.

It is an arithmetic number, because the mean of its divisors is an integer number (840856).

2^1681711 is an apocalyptic number.

1681711 is a deficient number, since it is larger than the sum of its proper divisors (1).

1681711 is an equidigital number, since it uses as much as digits as its factorization.

1681711 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336, while the sum is 25.

The square root of 1681711 is about 1296.8080042936. The cubic root of 1681711 is about 118.9187827054.

The spelling of 1681711 in words is "one million, six hundred eighty-one thousand, seven hundred eleven".