680629771 has 2 divisors, whose sum is σ = 680629772. Its totient is φ = 680629770.

The previous prime is 680629753. The next prime is 680629783. The reversal of 680629771 is 177926086.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 680629771 - 2⁹ = 680629259 is a prime.

It is not a weakly prime, because it can be changed into another prime (680629721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340314885 + 340314886.

It is an arithmetic number, because the mean of its divisors is an integer number (340314886).

Almost surely, 2^680629771 is an apocalyptic number.

680629771 is a deficient number, since it is larger than the sum of its proper divisors (1).

680629771 is an equidigital number, since it uses as much as digits as its factorization.

680629771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 680629771 is about 26088.8821339666. The cubic root of 680629771 is about 879.6373208472.

The spelling of 680629771 in words is "six hundred eighty million, six hundred twenty-nine thousand, seven hundred seventy-one".