1123303213 has 2 divisors, whose sum is σ = 1123303214. Its totient is φ = 1123303212.

The previous prime is 1123303211. The next prime is 1123303217. The reversal of 1123303213 is 3123033211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 977062564 + 146240649 = 31258^2 + 12093^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123303213 - 2¹ = 1123303211 is a prime.

It is a super-2 number, since 2×1123303213² = 2523620216672246738, which contains 22 as substring.

Together with 1123303211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123303211) 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, 561651606 + 561651607.

It is an arithmetic number, because the mean of its divisors is an integer number (561651607).

Almost surely, 2^1123303213 is an apocalyptic number.

It is an amenable number.

1123303213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123303213 is an equidigital number, since it uses as much as digits as its factorization.

1123303213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 1123303213 is about 33515.7159105993. The cubic root of 1123303213 is about 1039.5187655823.

Adding to 1123303213 its reverse (3123033211), we get a palindrome (4246336424).

The spelling of 1123303213 in words is "one billion, one hundred twenty-three million, three hundred three thousand, two hundred thirteen".