646600313 has 2 divisors, whose sum is σ = 646600314. Its totient is φ = 646600312.

The previous prime is 646600289. The next prime is 646600333. The reversal of 646600313 is 313006646.

646600313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 595506409 + 51093904 = 24403^2 + 7148^2 .

It is a cyclic number.

It is not a de Polignac number, because 646600313 - 2¹⁴ = 646583929 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (646600333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323300156 + 323300157.

It is an arithmetic number, because the mean of its divisors is an integer number (323300157).

Almost surely, 2^646600313 is an apocalyptic number.

It is an amenable number.

646600313 is a deficient number, since it is larger than the sum of its proper divisors (1).

646600313 is an equidigital number, since it uses as much as digits as its factorization.

646600313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 646600313 is about 25428.3368115180. The cubic root of 646600313 is about 864.7262381132.

Adding to 646600313 its reverse (313006646), we get a palindrome (959606959).

The spelling of 646600313 in words is "six hundred forty-six million, six hundred thousand, three hundred thirteen".