1123553513 has 2 divisors, whose sum is σ = 1123553514. Its totient is φ = 1123553512.

The previous prime is 1123553503. The next prime is 1123553549. The reversal of 1123553513 is 3153553211.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 723233449 + 400320064 = 26893^2 + 20008^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123553513 - 2⁸ = 1123553257 is a prime.

It is not a weakly prime, because it can be changed into another prime (1123553503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561776756 + 561776757.

It is an arithmetic number, because the mean of its divisors is an integer number (561776757).

Almost surely, 2^1123553513 is an apocalyptic number.

It is an amenable number.

1123553513 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123553513 is an equidigital number, since it uses as much as digits as its factorization.

1123553513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6750, while the sum is 29.

The square root of 1123553513 is about 33519.4497717370. The cubic root of 1123553513 is about 1039.5959700927.

The spelling of 1123553513 in words is "one billion, one hundred twenty-three million, five hundred fifty-three thousand, five hundred thirteen".