1089560789 has 4 divisors (see below), whose sum is σ = 1114899456. Its totient is φ = 1064222124.

The previous prime is 1089560779. The next prime is 1089560851. The reversal of 1089560789 is 9870659801.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9870659801 = 173 ⋅57055837.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1089560789 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1089560789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1089560749) 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, 12669269 + ... + 12669354.

It is an arithmetic number, because the mean of its divisors is an integer number (278724864).

Almost surely, 2^1089560789 is an apocalyptic number.

It is an amenable number.

1089560789 is a deficient number, since it is larger than the sum of its proper divisors (25338667).

1089560789 is an equidigital number, since it uses as much as digits as its factorization.

1089560789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25338666.

The product of its (nonzero) digits is 1088640, while the sum is 53.

The square root of 1089560789 is about 33008.4957094382. The cubic root of 1089560789 is about 1029.0042184316.

The spelling of 1089560789 in words is "one billion, eighty-nine million, five hundred sixty thousand, seven hundred eighty-nine".