680329387 has 2 divisors, whose sum is σ = 680329388. Its totient is φ = 680329386.

The previous prime is 680329369. The next prime is 680329393. The reversal of 680329387 is 783923086.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-680329387 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (680329327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340164693 + 340164694.

It is an arithmetic number, because the mean of its divisors is an integer number (340164694).

Almost surely, 2^680329387 is an apocalyptic number.

680329387 is a deficient number, since it is larger than the sum of its proper divisors (1).

680329387 is an equidigital number, since it uses as much as digits as its factorization.

680329387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 680329387 is about 26083.1245635948. The cubic root of 680329387 is about 879.5078976430.

The spelling of 680329387 in words is "six hundred eighty million, three hundred twenty-nine thousand, three hundred eighty-seven".