1128069689 has 4 divisors (see below), whose sum is σ = 1136681040. Its totient is φ = 1119458340.

The previous prime is 1128069673. The next prime is 1128069713. The reversal of 1128069689 is 9869608211.

It is a happy number.

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 1128069689 - 2⁴ = 1128069673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1128069659) 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 in 3 ways as a sum of consecutive naturals, for example, 4305479 + ... + 4305740.

It is an arithmetic number, because the mean of its divisors is an integer number (284170260).

Almost surely, 2^1128069689 is an apocalyptic number.

It is an amenable number.

1128069689 is a deficient number, since it is larger than the sum of its proper divisors (8611351).

1128069689 is an equidigital number, since it uses as much as digits as its factorization.

1128069689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8611350.

The product of its (nonzero) digits is 373248, while the sum is 50.

The square root of 1128069689 is about 33586.7487113594. The cubic root of 1128069689 is about 1040.9870095452.

The spelling of 1128069689 in words is "one billion, one hundred twenty-eight million, sixty-nine thousand, six hundred eighty-nine".