1685963 has 2 divisors, whose sum is σ = 1685964. Its totient is φ = 1685962.

The previous prime is 1685953. The next prime is 1685977. The reversal of 1685963 is 3695861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1685963 - 2⁸ = 1685707 is a prime.

It is not a weakly prime, because it can be changed into another prime (1685933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 842981 + 842982.

It is an arithmetic number, because the mean of its divisors is an integer number (842982).

2^1685963 is an apocalyptic number.

1685963 is a deficient number, since it is larger than the sum of its proper divisors (1).

1685963 is an equidigital number, since it uses as much as digits as its factorization.

1685963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 38.

The square root of 1685963 is about 1298.4463793319. The cubic root of 1685963 is about 119.0189222082.

The spelling of 1685963 in words is "one million, six hundred eighty-five thousand, nine hundred sixty-three".