1123443149 has 2 divisors, whose sum is σ = 1123443150. Its totient is φ = 1123443148.

The previous prime is 1123443133. The next prime is 1123443169. The reversal of 1123443149 is 9413443211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1078794025 + 44649124 = 32845^2 + 6682^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123443149 - 2⁴ = 1123443133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123443169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561721574 + 561721575.

It is an arithmetic number, because the mean of its divisors is an integer number (561721575).

Almost surely, 2^1123443149 is an apocalyptic number.

It is an amenable number.

1123443149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123443149 is an equidigital number, since it uses as much as digits as its factorization.

1123443149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 32.

The square root of 1123443149 is about 33517.8034632343. The cubic root of 1123443149 is about 1039.5619299616.

The spelling of 1123443149 in words is "one billion, one hundred twenty-three million, four hundred forty-three thousand, one hundred forty-nine".