1680842017 has 4 divisors (see below), whose sum is σ = 1685422336. Its totient is φ = 1676261700.

The previous prime is 1680841991. The next prime is 1680842039. The reversal of 1680842017 is 7102480861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1680842017 - 2¹¹ = 1680839969 is a prime.

It is a super-2 number, since 2×1680842017² = 5650459772225256578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1680842057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2289609 + ... + 2290342.

It is an arithmetic number, because the mean of its divisors is an integer number (421355584).

Almost surely, 2^1680842017 is an apocalyptic number.

It is an amenable number.

1680842017 is a deficient number, since it is larger than the sum of its proper divisors (4580319).

1680842017 is an equidigital number, since it uses as much as digits as its factorization.

1680842017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4580318.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 1680842017 is about 40998.0733327799. The cubic root of 1680842017 is about 1188.9829638627.

The spelling of 1680842017 in words is "one billion, six hundred eighty million, eight hundred forty-two thousand, seventeen".