1680010217 has 2 divisors, whose sum is σ = 1680010218. Its totient is φ = 1680010216.

The previous prime is 1680010169. The next prime is 1680010243. The reversal of 1680010217 is 7120100861.

It is an a-pointer prime, because the next prime (1680010243) can be obtained adding 1680010217 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 918029401 + 761980816 = 30299^2 + 27604^2 .

It is a cyclic number.

It is not a de Polignac number, because 1680010217 - 2¹⁰ = 1680009193 is a prime.

It is not a weakly prime, because it can be changed into another prime (1680010117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840005108 + 840005109.

It is an arithmetic number, because the mean of its divisors is an integer number (840005109).

Almost surely, 2^1680010217 is an apocalyptic number.

It is an amenable number.

1680010217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680010217 is an equidigital number, since it uses as much as digits as its factorization.

1680010217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 1680010217 is about 40987.9276982870. The cubic root of 1680010217 is about 1188.7868004307.

The spelling of 1680010217 in words is "one billion, six hundred eighty million, ten thousand, two hundred seventeen".