680909167 has 2 divisors, whose sum is σ = 680909168. Its totient is φ = 680909166.

The previous prime is 680909161. The next prime is 680909189. The reversal of 680909167 is 761909086.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 680909167 - 2¹⁹ = 680384879 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 (680909161) 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, 340454583 + 340454584.

It is an arithmetic number, because the mean of its divisors is an integer number (340454584).

Almost surely, 2^680909167 is an apocalyptic number.

680909167 is a deficient number, since it is larger than the sum of its proper divisors (1).

680909167 is an equidigital number, since it uses as much as digits as its factorization.

680909167 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 680909167 is about 26094.2362793012. The cubic root of 680909167 is about 879.7576670022.

The spelling of 680909167 in words is "six hundred eighty million, nine hundred nine thousand, one hundred sixty-seven".