680031217 has 2 divisors, whose sum is σ = 680031218. Its totient is φ = 680031216.

The previous prime is 680031211. The next prime is 680031293. The reversal of 680031217 is 712130086.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 679957776 + 73441 = 26076^2 + 271^2 .

It is a cyclic number.

It is not a de Polignac number, because 680031217 - 2⁷ = 680031089 is a prime.

It is not a weakly prime, because it can be changed into another prime (680031211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340015608 + 340015609.

It is an arithmetic number, because the mean of its divisors is an integer number (340015609).

Almost surely, 2^680031217 is an apocalyptic number.

It is an amenable number.

680031217 is a deficient number, since it is larger than the sum of its proper divisors (1).

680031217 is an equidigital number, since it uses as much as digits as its factorization.

680031217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 680031217 is about 26077.4081725926. The cubic root of 680031217 is about 879.3793906798.

The spelling of 680031217 in words is "six hundred eighty million, thirty-one thousand, two hundred seventeen".