680745029 has 2 divisors, whose sum is σ = 680745030. Its totient is φ = 680745028.

The previous prime is 680744993. The next prime is 680745047. The reversal of 680745029 is 920547086.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 668481025 + 12264004 = 25855^2 + 3502^2 .

It is a cyclic number.

It is not a de Polignac number, because 680745029 - 2¹² = 680740933 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680705029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340372514 + 340372515.

It is an arithmetic number, because the mean of its divisors is an integer number (340372515).

Almost surely, 2^680745029 is an apocalyptic number.

It is an amenable number.

680745029 is a deficient number, since it is larger than the sum of its proper divisors (1).

680745029 is an equidigital number, since it uses as much as digits as its factorization.

680745029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 680745029 is about 26091.0909890713. The cubic root of 680745029 is about 879.6869707060.

The spelling of 680745029 in words is "six hundred eighty million, seven hundred forty-five thousand, twenty-nine".