680603028109 has 2 divisors, whose sum is σ = 680603028110. Its totient is φ = 680603028108.

The previous prime is 680603028043. The next prime is 680603028113. The reversal of 680603028109 is 901820306086.

680603028109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 671380306884 + 9222721225 = 819378^2 + 96035^2 .

It is a cyclic number.

It is not a de Polignac number, because 680603028109 - 2³⁷ = 543164074637 is a prime.

It is a super-2 number, since 2×680603028109² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680603028139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340301514054 + 340301514055.

It is an arithmetic number, because the mean of its divisors is an integer number (340301514055).

Almost surely, 2^680603028109 is an apocalyptic number.

It is an amenable number.

680603028109 is a deficient number, since it is larger than the sum of its proper divisors (1).

680603028109 is an equidigital number, since it uses as much as digits as its factorization.

680603028109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 43.

The spelling of 680603028109 in words is "six hundred eighty billion, six hundred three million, twenty-eight thousand, one hundred nine".