1685005204039 has 2 divisors, whose sum is σ = 1685005204040. Its totient is φ = 1685005204038.

The previous prime is 1685005204031. The next prime is 1685005204079. The reversal of 1685005204039 is 9304025005861.

It is a weak prime.

It is an emirp because it is prime and its reverse (9304025005861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1685005204039 - 2³ = 1685005204031 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1685005203986 and 1685005204004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1685005204031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 842502602019 + 842502602020.

It is an arithmetic number, because the mean of its divisors is an integer number (842502602020).

Almost surely, 2^{1685005204039} is an apocalyptic number.

1685005204039 is a deficient number, since it is larger than the sum of its proper divisors (1).

1685005204039 is an equidigital number, since it uses as much as digits as its factorization.

1685005204039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 1685005204039 in words is "one trillion, six hundred eighty-five billion, five million, two hundred four thousand, thirty-nine".