680430077 has 2 divisors, whose sum is σ = 680430078. Its totient is φ = 680430076.

The previous prime is 680430073. The next prime is 680430119. The reversal of 680430077 is 770034086.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 470933401 + 209496676 = 21701^2 + 14474^2 .

It is a cyclic number.

It is not a de Polignac number, because 680430077 - 2² = 680430073 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 (680430073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340215038 + 340215039.

It is an arithmetic number, because the mean of its divisors is an integer number (340215039).

Almost surely, 2^680430077 is an apocalyptic number.

It is an amenable number.

680430077 is a deficient number, since it is larger than the sum of its proper divisors (1).

680430077 is an equidigital number, since it uses as much as digits as its factorization.

680430077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 680430077 is about 26085.0546673761. The cubic root of 680430077 is about 879.5512850979.

The spelling of 680430077 in words is "six hundred eighty million, four hundred thirty thousand, seventy-seven".