1123280189 has 2 divisors, whose sum is σ = 1123280190. Its totient is φ = 1123280188.

The previous prime is 1123280183. The next prime is 1123280201. The reversal of 1123280189 is 9810823211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1123255225 + 24964 = 33515^2 + 158^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123280189 - 2²⁰ = 1122231613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123280183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561640094 + 561640095.

It is an arithmetic number, because the mean of its divisors is an integer number (561640095).

Almost surely, 2^1123280189 is an apocalyptic number.

It is an amenable number.

1123280189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123280189 is an equidigital number, since it uses as much as digits as its factorization.

1123280189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 1123280189 is about 33515.3724281858. The cubic root of 1123280189 is about 1039.5116633018.

The spelling of 1123280189 in words is "one billion, one hundred twenty-three million, two hundred eighty thousand, one hundred eighty-nine".