1123203149 has 2 divisors, whose sum is σ = 1123203150. Its totient is φ = 1123203148.

The previous prime is 1123203127. The next prime is 1123203157. The reversal of 1123203149 is 9413023211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 713424100 + 409779049 = 26710^2 + 20243^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123203149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123203349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561601574 + 561601575.

It is an arithmetic number, because the mean of its divisors is an integer number (561601575).

Almost surely, 2^1123203149 is an apocalyptic number.

It is an amenable number.

1123203149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123203149 is an equidigital number, since it uses as much as digits as its factorization.

1123203149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1123203149 is about 33514.2230851321. The cubic root of 1123203149 is about 1039.4878978423.

The spelling of 1123203149 in words is "one billion, one hundred twenty-three million, two hundred three thousand, one hundred forty-nine".