1800563 has 2 divisors, whose sum is σ = 1800564. Its totient is φ = 1800562.

The previous prime is 1800553. The next prime is 1800577. The reversal of 1800563 is 3650081.

It is a weak prime.

It is an emirp because it is prime and its reverse (3650081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1800563 - 2⁶ = 1800499 is a prime.

It is not a weakly prime, because it can be changed into another prime (1800553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 900281 + 900282.

It is an arithmetic number, because the mean of its divisors is an integer number (900282).

2^1800563 is an apocalyptic number.

1800563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1800563 is an equidigital number, since it uses as much as digits as its factorization.

1800563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1800563 is about 1341.8505878077. The cubic root of 1800563 is about 121.6567211069.

The spelling of 1800563 in words is "one million, eight hundred thousand, five hundred sixty-three".