680397317 has 2 divisors, whose sum is σ = 680397318. Its totient is φ = 680397316.

The previous prime is 680397287. The next prime is 680397343. The reversal of 680397317 is 713793086.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 588256516 + 92140801 = 24254^2 + 9599^2 .

It is a cyclic number.

It is not a de Polignac number, because 680397317 - 2¹² = 680393221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680397917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340198658 + 340198659.

It is an arithmetic number, because the mean of its divisors is an integer number (340198659).

Almost surely, 2^680397317 is an apocalyptic number.

It is an amenable number.

680397317 is a deficient number, since it is larger than the sum of its proper divisors (1).

680397317 is an equidigital number, since it uses as much as digits as its factorization.

680397317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 44.

The square root of 680397317 is about 26084.4267140376. The cubic root of 680397317 is about 879.5371692401.

The spelling of 680397317 in words is "six hundred eighty million, three hundred ninety-seven thousand, three hundred seventeen".