1123005563 has 2 divisors, whose sum is σ = 1123005564. Its totient is φ = 1123005562.

The previous prime is 1123005551. The next prime is 1123005589. The reversal of 1123005563 is 3655003211.

It is an a-pointer prime, because the next prime (1123005589) can be obtained adding 1123005563 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1123005563 - 2¹⁰ = 1123004539 is a prime.

It is a super-2 number, since 2×1123005563² = 2522282989057893938, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1123007563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561502781 + 561502782.

It is an arithmetic number, because the mean of its divisors is an integer number (561502782).

Almost surely, 2^1123005563 is an apocalyptic number.

1123005563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123005563 is an equidigital number, since it uses as much as digits as its factorization.

1123005563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 1123005563 is about 33511.2751622495. The cubic root of 1123005563 is about 1039.4269411339.

Adding to 1123005563 its reverse (3655003211), we get a palindrome (4778008774).

The spelling of 1123005563 in words is "one billion, one hundred twenty-three million, five thousand, five hundred sixty-three".