1705684683917 has 2 divisors, whose sum is σ = 1705684683918. Its totient is φ = 1705684683916.

The previous prime is 1705684683893. The next prime is 1705684683959. The reversal of 1705684683917 is 7193864865071.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1675818277156 + 29866406761 = 1294534^2 + 172819^2 .

It is an emirp because it is prime and its reverse (7193864865071) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1705684683917 - 2³⁰ = 1704610942093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1705684683317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 852842341958 + 852842341959.

It is an arithmetic number, because the mean of its divisors is an integer number (852842341959).

Almost surely, 2^{1705684683917} is an apocalyptic number.

It is an amenable number.

1705684683917 is a deficient number, since it is larger than the sum of its proper divisors (1).

1705684683917 is an equidigital number, since it uses as much as digits as its factorization.

1705684683917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60963840, while the sum is 65.

The spelling of 1705684683917 in words is "one trillion, seven hundred five billion, six hundred eighty-four million, six hundred eighty-three thousand, nine hundred seventeen".