648563 has 2 divisors, whose sum is σ = 648564. Its totient is φ = 648562.

The previous prime is 648509. The next prime is 648607. The reversal of 648563 is 365846.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-648563 is a prime.

It is not a weakly prime, because it can be changed into another prime (648763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324281 + 324282.

It is an arithmetic number, because the mean of its divisors is an integer number (324282).

2⁶⁴⁸⁵⁶³ is an apocalyptic number.

648563 is a deficient number, since it is larger than the sum of its proper divisors (1).

648563 is an equidigital number, since it uses as much as digits as its factorization.

648563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 32.

The square root of 648563 is about 805.3340921630. The cubic root of 648563 is about 86.5600282759.

The spelling of 648563 in words is "six hundred forty-eight thousand, five hundred sixty-three".