6840313 has 2 divisors, whose sum is σ = 6840314. Its totient is φ = 6840312.

The previous prime is 6840299. The next prime is 6840331. The reversal of 6840313 is 3130486.

Together with next prime (6840331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6827769 + 12544 = 2613^2 + 112^2 .

It is a cyclic number.

It is not a de Polignac number, because 6840313 - 2⁹ = 6839801 is a prime.

It is not a weakly prime, because it can be changed into another prime (6840013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3420156 + 3420157.

It is an arithmetic number, because the mean of its divisors is an integer number (3420157).

Almost surely, 2^6840313 is an apocalyptic number.

It is an amenable number.

6840313 is a deficient number, since it is larger than the sum of its proper divisors (1).

6840313 is an equidigital number, since it uses as much as digits as its factorization.

6840313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 6840313 is about 2615.3992047104. The cubic root of 6840313 is about 189.8272945861.

Adding to 6840313 its reverse (3130486), we get a palindrome (9970799).

The spelling of 6840313 in words is "six million, eight hundred forty thousand, three hundred thirteen".