680788441 has 2 divisors, whose sum is σ = 680788442. Its totient is φ = 680788440.

The previous prime is 680788421. The next prime is 680788457. The reversal of 680788441 is 144887086.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 565440841 + 115347600 = 23779^2 + 10740^2 .

It is a cyclic number.

It is not a de Polignac number, because 680788441 - 2⁹ = 680787929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 680788391 and 680788400.

It is not a weakly prime, because it can be changed into another prime (680788421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340394220 + 340394221.

It is an arithmetic number, because the mean of its divisors is an integer number (340394221).

Almost surely, 2^680788441 is an apocalyptic number.

It is an amenable number.

680788441 is a deficient number, since it is larger than the sum of its proper divisors (1).

680788441 is an equidigital number, since it uses as much as digits as its factorization.

680788441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 344064, while the sum is 46.

The square root of 680788441 is about 26091.9229072907. The cubic root of 680788441 is about 879.7056699043.

The spelling of 680788441 in words is "six hundred eighty million, seven hundred eighty-eight thousand, four hundred forty-one".