1123126889 has 2 divisors, whose sum is σ = 1123126890. Its totient is φ = 1123126888.

The previous prime is 1123126861. The next prime is 1123126943. The reversal of 1123126889 is 9886213211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1110022489 + 13104400 = 33317^2 + 3620^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123126889 - 2⁸ = 1123126633 is a prime.

It is a super-2 number, since 2×1123126889² = 2522828017589636642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1123126189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561563444 + 561563445.

It is an arithmetic number, because the mean of its divisors is an integer number (561563445).

Almost surely, 2^1123126889 is an apocalyptic number.

It is an amenable number.

1123126889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123126889 is an equidigital number, since it uses as much as digits as its factorization.

1123126889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 41.

The square root of 1123126889 is about 33513.0853399086. The cubic root of 1123126889 is about 1039.4643719285.

The spelling of 1123126889 in words is "one billion, one hundred twenty-three million, one hundred twenty-six thousand, eight hundred eighty-nine".