1680107081 has 2 divisors, whose sum is σ = 1680107082. Its totient is φ = 1680107080.

The previous prime is 1680107041. The next prime is 1680107119. The reversal of 1680107081 is 1807010861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1608010000 + 72097081 = 40100^2 + 8491^2 .

It is an emirp because it is prime and its reverse (1807010861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1680107081 - 2⁶ = 1680107017 is a prime.

It is a super-2 number, since 2×1680107081² = 5645519607252681122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1680107041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840053540 + 840053541.

It is an arithmetic number, because the mean of its divisors is an integer number (840053541).

Almost surely, 2^1680107081 is an apocalyptic number.

It is an amenable number.

1680107081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680107081 is an equidigital number, since it uses as much as digits as its factorization.

1680107081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 32.

The square root of 1680107081 is about 40989.1092974707. The cubic root of 1680107081 is about 1188.8096472028.

The spelling of 1680107081 in words is "one billion, six hundred eighty million, one hundred seven thousand, eighty-one".