680243867 has 2 divisors, whose sum is σ = 680243868. Its totient is φ = 680243866.

The previous prime is 680243849. The next prime is 680243869. The reversal of 680243867 is 768342086.

680243867 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 is a cyclic number.

It is not a de Polignac number, because 680243867 - 2⁶ = 680243803 is a prime.

It is a super-2 number, since 2×680243867² = 925463437182227378, which contains 22 as substring.

Together with 680243869, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (680243869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340121933 + 340121934.

It is an arithmetic number, because the mean of its divisors is an integer number (340121934).

Almost surely, 2^680243867 is an apocalyptic number.

680243867 is a deficient number, since it is larger than the sum of its proper divisors (1).

680243867 is an equidigital number, since it uses as much as digits as its factorization.

680243867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 387072, while the sum is 44.

The square root of 680243867 is about 26081.4851379288. The cubic root of 680243867 is about 879.4710435991.

The spelling of 680243867 in words is "six hundred eighty million, two hundred forty-three thousand, eight hundred sixty-seven".