680730877 has 2 divisors, whose sum is σ = 680730878. Its totient is φ = 680730876.

The previous prime is 680730857. The next prime is 680730907. The reversal of 680730877 is 778037086.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 592727716 + 88003161 = 24346^2 + 9381^2 .

It is a cyclic number.

It is not a de Polignac number, because 680730877 - 2²³ = 672342269 is a prime.

It is a super-3 number, since 3×680730877³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680730857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340365438 + 340365439.

It is an arithmetic number, because the mean of its divisors is an integer number (340365439).

Almost surely, 2^680730877 is an apocalyptic number.

It is an amenable number.

680730877 is a deficient number, since it is larger than the sum of its proper divisors (1).

680730877 is an equidigital number, since it uses as much as digits as its factorization.

680730877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 395136, while the sum is 46.

The square root of 680730877 is about 26090.8197839777. The cubic root of 680730877 is about 879.6808747299.

The spelling of 680730877 in words is "six hundred eighty million, seven hundred thirty thousand, eight hundred seventy-seven".