680780701 has 2 divisors, whose sum is σ = 680780702. Its totient is φ = 680780700.

The previous prime is 680780651. The next prime is 680780719. The reversal of 680780701 is 107087086.

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., 672364900 + 8415801 = 25930^2 + 2901^2 .

It is a cyclic number.

It is not a de Polignac number, because 680780701 - 2²⁹ = 143909789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680780741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340390350 + 340390351.

It is an arithmetic number, because the mean of its divisors is an integer number (340390351).

Almost surely, 2^680780701 is an apocalyptic number.

It is an amenable number.

680780701 is a deficient number, since it is larger than the sum of its proper divisors (1).

680780701 is an equidigital number, since it uses as much as digits as its factorization.

680780701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18816, while the sum is 37.

The square root of 680780701 is about 26091.7745851063. The cubic root of 680780701 is about 879.7023360504.

The spelling of 680780701 in words is "six hundred eighty million, seven hundred eighty thousand, seven hundred one".