1089788689 has 32 divisors (see below), whose sum is σ = 1295167104. Its totient is φ = 905748480.

The previous prime is 1089788543. The next prime is 1089788699. The reversal of 1089788689 is 9868879801.

It is a cyclic number.

It is not a de Polignac number, because 1089788689 - 2⁹ = 1089788177 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1089788689.

It is not an unprimeable number, because it can be changed into a prime (1089788699) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2516617 + ... + 2517049.

It is an arithmetic number, because the mean of its divisors is an integer number (40473972).

Almost surely, 2^1089788689 is an apocalyptic number.

It is an amenable number.

1089788689 is a deficient number, since it is larger than the sum of its proper divisors (205378415).

1089788689 is a wasteful number, since it uses less digits than its factorization.

1089788689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817.

The product of its (nonzero) digits is 13934592, while the sum is 64.

The square root of 1089788689 is about 33011.9476705026. The cubic root of 1089788689 is about 1029.0759579543.

The spelling of 1089788689 in words is "one billion, eighty-nine million, seven hundred eighty-eight thousand, six hundred eighty-nine".