1123013009 has 2 divisors, whose sum is σ = 1123013010. Its totient is φ = 1123013008.

The previous prime is 1123012999. The next prime is 1123013029. The reversal of 1123013009 is 9003103211.

It is an a-pointer prime, because the next prime (1123013029) can be obtained adding 1123013009 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1106227600 + 16785409 = 33260^2 + 4097^2 .

It is an emirp because it is prime and its reverse (9003103211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1123013009 - 2⁸ = 1123012753 is a prime.

It is a super-2 number, since 2×1123013009² = 2522316436766468162, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1123013029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561506504 + 561506505.

It is an arithmetic number, because the mean of its divisors is an integer number (561506505).

Almost surely, 2^1123013009 is an apocalyptic number.

It is an amenable number.

1123013009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123013009 is an equidigital number, since it uses as much as digits as its factorization.

1123013009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 1123013009 is about 33511.3862590016. The cubic root of 1123013009 is about 1039.4292384083.

The spelling of 1123013009 in words is "one billion, one hundred twenty-three million, thirteen thousand, nine".