1123235513 has 2 divisors, whose sum is σ = 1123235514. Its totient is φ = 1123235512.

The previous prime is 1123235437. The next prime is 1123235539. The reversal of 1123235513 is 3155323211.

It is an a-pointer prime, because the next prime (1123235539) can be obtained adding 1123235513 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 940526224 + 182709289 = 30668^2 + 13517^2 .

It is an emirp because it is prime and its reverse (3155323211) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123235513 is a prime.

It is not a weakly prime, because it can be changed into another prime (1123205513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561617756 + 561617757.

It is an arithmetic number, because the mean of its divisors is an integer number (561617757).

Almost surely, 2^1123235513 is an apocalyptic number.

It is an amenable number.

1123235513 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123235513 is an equidigital number, since it uses as much as digits as its factorization.

1123235513 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1123235513 is about 33514.7059214310. The cubic root of 1123235513 is about 1039.4978816887.

Adding to 1123235513 its reverse (3155323211), we get a palindrome (4278558724).

The spelling of 1123235513 in words is "one billion, one hundred twenty-three million, two hundred thirty-five thousand, five hundred thirteen".