1685020038347 has 2 divisors, whose sum is σ = 1685020038348. Its totient is φ = 1685020038346.

The previous prime is 1685020038307. The next prime is 1685020038371. The reversal of 1685020038347 is 7438300205861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1685020038347 - 2³⁸ = 1410142131403 is a prime.

It is not a weakly prime, because it can be changed into another prime (1685020038307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 842510019173 + 842510019174.

It is an arithmetic number, because the mean of its divisors is an integer number (842510019174).

Almost surely, 2^{1685020038347} is an apocalyptic number.

1685020038347 is a deficient number, since it is larger than the sum of its proper divisors (1).

1685020038347 is an equidigital number, since it uses as much as digits as its factorization.

1685020038347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 967680, while the sum is 47.

The spelling of 1685020038347 in words is "one trillion, six hundred eighty-five billion, twenty million, thirty-eight thousand, three hundred forty-seven".