1123517909 has 2 divisors, whose sum is σ = 1123517910. Its totient is φ = 1123517908.

The previous prime is 1123517893. The next prime is 1123517929. The reversal of 1123517909 is 9097153211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1053327025 + 70190884 = 32455^2 + 8378^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123517909 - 2⁴ = 1123517893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123517929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561758954 + 561758955.

It is an arithmetic number, because the mean of its divisors is an integer number (561758955).

Almost surely, 2^1123517909 is an apocalyptic number.

It is an amenable number.

1123517909 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123517909 is an equidigital number, since it uses as much as digits as its factorization.

1123517909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17010, while the sum is 38.

The square root of 1123517909 is about 33518.9186728928. The cubic root of 1123517909 is about 1039.5849888130.

The spelling of 1123517909 in words is "one billion, one hundred twenty-three million, five hundred seventeen thousand, nine hundred nine".