1123000999 has 2 divisors, whose sum is σ = 1123001000. Its totient is φ = 1123000998.

The previous prime is 1123000987. The next prime is 1123001027. The reversal of 1123000999 is 9990003211.

It is a weak prime.

It is an emirp because it is prime and its reverse (9990003211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1123000999 - 2¹⁷ = 1122869927 is a prime.

It is a super-2 number, since 2×1123000999² = 2522262487509996002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123000969) 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, 561500499 + 561500500.

It is an arithmetic number, because the mean of its divisors is an integer number (561500500).

Almost surely, 2^1123000999 is an apocalyptic number.

1123000999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123000999 is an equidigital number, since it uses as much as digits as its factorization.

1123000999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4374, while the sum is 34.

The square root of 1123000999 is about 33511.2070656967. The cubic root of 1123000999 is about 1039.4255330224.

The spelling of 1123000999 in words is "one billion, one hundred twenty-three million, nine hundred ninety-nine", and thus it is an aban number.