680107189 has 2 divisors, whose sum is σ = 680107190. Its totient is φ = 680107188.

The previous prime is 680107157. The next prime is 680107193. The reversal of 680107189 is 981701086.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 454116100 + 225991089 = 21310^2 + 15033^2 .

It is a cyclic number.

It is not a de Polignac number, because 680107189 - 2⁵ = 680107157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680107199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340053594 + 340053595.

It is an arithmetic number, because the mean of its divisors is an integer number (340053595).

Almost surely, 2^680107189 is an apocalyptic number.

It is an amenable number.

680107189 is a deficient number, since it is larger than the sum of its proper divisors (1).

680107189 is an equidigital number, since it uses as much as digits as its factorization.

680107189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 40.

The square root of 680107189 is about 26078.8647950788. The cubic root of 680107189 is about 879.4121370801.

The spelling of 680107189 in words is "six hundred eighty million, one hundred seven thousand, one hundred eighty-nine".