1720680001 has 2 divisors, whose sum is σ = 1720680002. Its totient is φ = 1720680000.

The previous prime is 1720679977. The next prime is 1720680019. The reversal of 1720680001 is 1000860271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1501640001 + 219040000 = 38751^2 + 14800^2 .

It is a cyclic number.

It is not a de Polignac number, because 1720680001 - 2⁵ = 1720679969 is a prime.

It is not a weakly prime, because it can be changed into another prime (1720680061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 860340000 + 860340001.

It is an arithmetic number, because the mean of its divisors is an integer number (860340001).

Almost surely, 2^1720680001 is an apocalyptic number.

It is an amenable number.

1720680001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1720680001 is an equidigital number, since it uses as much as digits as its factorization.

1720680001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 1720680001 is about 41481.0800365661. The cubic root of 1720680001 is about 1198.3031575227.

The spelling of 1720680001 in words is "one billion, seven hundred twenty million, six hundred eighty thousand, one".