6520387 has 2 divisors, whose sum is σ = 6520388. Its totient is φ = 6520386.

The previous prime is 6520379. The next prime is 6520403. The reversal of 6520387 is 7830256.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6520387 - 2³ = 6520379 is a prime.

It is not a weakly prime, because it can be changed into another prime (6520487) 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, 3260193 + 3260194.

It is an arithmetic number, because the mean of its divisors is an integer number (3260194).

Almost surely, 2^6520387 is an apocalyptic number.

6520387 is a deficient number, since it is larger than the sum of its proper divisors (1).

6520387 is an equidigital number, since it uses as much as digits as its factorization.

6520387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 6520387 is about 2553.5048462848. The cubic root of 6520387 is about 186.8204688338.

The spelling of 6520387 in words is "six million, five hundred twenty thousand, three hundred eighty-seven".