1680006919 has 4 divisors (see below), whose sum is σ = 1681231896. Its totient is φ = 1678781944.

The previous prime is 1680006851. The next prime is 1680006931. The reversal of 1680006919 is 9196000861.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1680006919 - 2⁷ = 1680006791 is a prime.

It is a super-2 number, since 2×1680006919² = 5644846495775745122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680004919) 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, 610429 + ... + 613174.

It is an arithmetic number, because the mean of its divisors is an integer number (420307974).

Almost surely, 2^1680006919 is an apocalyptic number.

1680006919 is a deficient number, since it is larger than the sum of its proper divisors (1224977).

1680006919 is a wasteful number, since it uses less digits than its factorization.

1680006919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224976.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 1680006919 is about 40987.8874669091. The cubic root of 1680006919 is about 1188.7860225344.

The spelling of 1680006919 in words is "one billion, six hundred eighty million, six thousand, nine hundred nineteen".