6520963 has 2 divisors, whose sum is σ = 6520964. Its totient is φ = 6520962.

The previous prime is 6520957. The next prime is 6520973. The reversal of 6520963 is 3690256.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6520963 - 2¹³ = 6512771 is a prime.

6520963 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (6520903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3260481 + 3260482.

It is an arithmetic number, because the mean of its divisors is an integer number (3260482).

Almost surely, 2^6520963 is an apocalyptic number.

6520963 is a deficient number, since it is larger than the sum of its proper divisors (1).

6520963 is an equidigital number, since it uses as much as digits as its factorization.

6520963 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 6520963 is about 2553.6176299517. The cubic root of 6520963 is about 186.8259698070.

The spelling of 6520963 in words is "six million, five hundred twenty thousand, nine hundred sixty-three".