676861 has 2 divisors, whose sum is σ = 676862. Its totient is φ = 676860.

The previous prime is 676859. The next prime is 676883. The reversal of 676861 is 168676.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 649636 + 27225 = 806^2 + 165^2 .

It is a cyclic number.

It is not a de Polignac number, because 676861 - 2¹ = 676859 is a prime.

Together with 676859, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (676891) 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, 338430 + 338431.

It is an arithmetic number, because the mean of its divisors is an integer number (338431).

2⁶⁷⁶⁸⁶¹ is an apocalyptic number.

It is an amenable number.

676861 is a deficient number, since it is larger than the sum of its proper divisors (1).

676861 is an equidigital number, since it uses as much as digits as its factorization.

676861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 34.

The square root of 676861 is about 822.7156252315. The cubic root of 676861 is about 87.8010744243.

It can be divided in two parts, 6 and 76861, that added together give a palindrome (76867).

The spelling of 676861 in words is "six hundred seventy-six thousand, eight hundred sixty-one".