1128917089 has 4 divisors (see below), whose sum is σ = 1139467824. Its totient is φ = 1118366356.

The previous prime is 1128917077. The next prime is 1128917093. The reversal of 1128917089 is 9807198211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1128917089 - 2¹¹ = 1128915041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1128915089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5275207 + ... + 5275420.

It is an arithmetic number, because the mean of its divisors is an integer number (284866956).

Almost surely, 2^1128917089 is an apocalyptic number.

It is an amenable number.

1128917089 is a deficient number, since it is larger than the sum of its proper divisors (10550735).

1128917089 is a wasteful number, since it uses less digits than its factorization.

1128917089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10550734.

The product of its (nonzero) digits is 72576, while the sum is 46.

The square root of 1128917089 is about 33599.3614373845. The cubic root of 1128917089 is about 1041.2476056202.

The spelling of 1128917089 in words is "one billion, one hundred twenty-eight million, nine hundred seventeen thousand, eighty-nine".