687341 has 2 divisors, whose sum is σ = 687342. Its totient is φ = 687340.

The previous prime is 687331. The next prime is 687343. The reversal of 687341 is 143786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 687241 + 100 = 829^2 + 10^2 .

It is a cyclic number.

It is not a de Polignac number, because 687341 - 2⁶ = 687277 is a prime.

It is a Sophie Germain prime.

Together with 687343, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (687343) 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, 343670 + 343671.

It is an arithmetic number, because the mean of its divisors is an integer number (343671).

2⁶⁸⁷³⁴¹ is an apocalyptic number.

It is an amenable number.

687341 is a deficient number, since it is larger than the sum of its proper divisors (1).

687341 is an equidigital number, since it uses as much as digits as its factorization.

687341 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 29.

The square root of 687341 is about 829.0603114370. The cubic root of 687341 is about 88.2519039145.

The spelling of 687341 in words is "six hundred eighty-seven thousand, three hundred forty-one".