680831 has 2 divisors, whose sum is σ = 680832. Its totient is φ = 680830.

The previous prime is 680809. The next prime is 680857. The reversal of 680831 is 138086.

It is an a-pointer prime, because the next prime (680857) can be obtained adding 680831 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 680831 - 2⁶ = 680767 is a prime.

It is a super-2 number, since 2×680831² = 927061701122, which contains 22 as substring.

It is a plaindrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 680831.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340415 + 340416.

It is an arithmetic number, because the mean of its divisors is an integer number (340416).

2⁶⁸⁰⁸³¹ is an apocalyptic number.

680831 is a deficient number, since it is larger than the sum of its proper divisors (1).

680831 is an equidigital number, since it uses as much as digits as its factorization.

680831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 680831 is about 825.1248390395. The cubic root of 680831 is about 87.9724000912.

The spelling of 680831 in words is "six hundred eighty thousand, eight hundred thirty-one".