1105123189 has 2 divisors, whose sum is σ = 1105123190. Its totient is φ = 1105123188.

The previous prime is 1105123183. The next prime is 1105123219. The reversal of 1105123189 is 9813215011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 958955089 + 146168100 = 30967^2 + 12090^2 .

It is a cyclic number.

It is not a de Polignac number, because 1105123189 - 2⁹ = 1105122677 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1105123189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1105123183) 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, 552561594 + 552561595.

It is an arithmetic number, because the mean of its divisors is an integer number (552561595).

Almost surely, 2^1105123189 is an apocalyptic number.

It is an amenable number.

1105123189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1105123189 is an equidigital number, since it uses as much as digits as its factorization.

1105123189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 31.

The square root of 1105123189 is about 33243.3931631535. The cubic root of 1105123189 is about 1033.8802296714.

The spelling of 1105123189 in words is "one billion, one hundred five million, one hundred twenty-three thousand, one hundred eighty-nine".