1803563 has 2 divisors, whose sum is σ = 1803564. Its totient is φ = 1803562.

The previous prime is 1803553. The next prime is 1803569. The reversal of 1803563 is 3653081.

It is a strong prime.

It is an emirp because it is prime and its reverse (3653081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1803563 - 2¹⁴ = 1787179 is a prime.

It is not a weakly prime, because it can be changed into another prime (1803569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 901781 + 901782.

It is an arithmetic number, because the mean of its divisors is an integer number (901782).

2^1803563 is an apocalyptic number.

1803563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1803563 is an equidigital number, since it uses as much as digits as its factorization.

1803563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 1803563 is about 1342.9679817479. The cubic root of 1803563 is about 121.7242495509.

The spelling of 1803563 in words is "one million, eight hundred three thousand, five hundred sixty-three".