1123188217 has 2 divisors, whose sum is σ = 1123188218. Its totient is φ = 1123188216.

The previous prime is 1123188193. The next prime is 1123188221. The reversal of 1123188217 is 7128813211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 930006016 + 193182201 = 30496^2 + 13899^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123188217 - 2⁷ = 1123188089 is a prime.

It is not a weakly prime, because it can be changed into another prime (1123188257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561594108 + 561594109.

It is an arithmetic number, because the mean of its divisors is an integer number (561594109).

Almost surely, 2^1123188217 is an apocalyptic number.

It is an amenable number.

1123188217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123188217 is an equidigital number, since it uses as much as digits as its factorization.

1123188217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5376, while the sum is 34.

The square root of 1123188217 is about 33514.0003133019. Note that the first 3 decimals coincide. The cubic root of 1123188217 is about 1039.4832914621.

The spelling of 1123188217 in words is "one billion, one hundred twenty-three million, one hundred eighty-eight thousand, two hundred seventeen".