6520313 has 2 divisors, whose sum is σ = 6520314. Its totient is φ = 6520312.

The previous prime is 6520309. The next prime is 6520321. The reversal of 6520313 is 3130256.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6210064 + 310249 = 2492^2 + 557^2 .

It is a cyclic number.

It is not a de Polignac number, because 6520313 - 2² = 6520309 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p₄₄₆₀₆₀ and since 6520313 and 446060 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (6520343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3260156 + 3260157.

It is an arithmetic number, because the mean of its divisors is an integer number (3260157).

Almost surely, 2^6520313 is an apocalyptic number.

It is an amenable number.

6520313 is a deficient number, since it is larger than the sum of its proper divisors (1).

6520313 is an equidigital number, since it uses as much as digits as its factorization.

6520313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 6520313 is about 2553.4903563554. The cubic root of 6520313 is about 186.8197620881.

Adding to 6520313 its reverse (3130256), we get a palindrome (9650569).

The spelling of 6520313 in words is "six million, five hundred twenty thousand, three hundred thirteen".