680080109 has 2 divisors, whose sum is σ = 680080110. Its totient is φ = 680080108.

The previous prime is 680080067. The next prime is 680080133. The reversal of 680080109 is 901080086.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 376554025 + 303526084 = 19405^2 + 17422^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-680080109 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680080409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340040054 + 340040055.

It is an arithmetic number, because the mean of its divisors is an integer number (340040055).

Almost surely, 2^680080109 is an apocalyptic number.

It is an amenable number.

680080109 is a deficient number, since it is larger than the sum of its proper divisors (1).

680080109 is an equidigital number, since it uses as much as digits as its factorization.

680080109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 680080109 is about 26078.3455955319. The cubic root of 680080109 is about 879.4004650000.

The spelling of 680080109 in words is "six hundred eighty million, eighty thousand, one hundred nine".