680382187 has 2 divisors, whose sum is σ = 680382188. Its totient is φ = 680382186.

The previous prime is 680382169. The next prime is 680382217. The reversal of 680382187 is 781283086.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-680382187 is a prime.

It is not a weakly prime, because it can be changed into another prime (680382487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340191093 + 340191094.

It is an arithmetic number, because the mean of its divisors is an integer number (340191094).

Almost surely, 2^680382187 is an apocalyptic number.

680382187 is a deficient number, since it is larger than the sum of its proper divisors (1).

680382187 is an equidigital number, since it uses as much as digits as its factorization.

680382187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129024, while the sum is 43.

The square root of 680382187 is about 26084.1366926337. The cubic root of 680382187 is about 879.5306497670.

It can be divided in two parts, 68038 and 2187, that added together give a square (70225 = 265²).

The spelling of 680382187 in words is "six hundred eighty million, three hundred eighty-two thousand, one hundred eighty-seven".