1089289 has 4 divisors (see below), whose sum is σ = 1146640. Its totient is φ = 1031940.

The previous prime is 1089259. The next prime is 1089299. The reversal of 1089289 is 9829801.

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: 9829801 = 499 ⋅19699.

It is a cyclic number.

It is not a de Polignac number, because 1089289 - 2⁷ = 1089161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1089239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28647 + ... + 28684.

It is an arithmetic number, because the mean of its divisors is an integer number (286660).

2^1089289 is an apocalyptic number.

1089289 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1089289 is a deficient number, since it is larger than the sum of its proper divisors (57351).

1089289 is an equidigital number, since it uses as much as digits as its factorization.

1089289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57350.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 1089289 is about 1043.6900881009. The cubic root of 1089289 is about 102.8918650226.

It can be divided in two parts, 1089 and 289, that multiplied together give a square (314721 = 561²).

The spelling of 1089289 in words is "one million, eighty-nine thousand, two hundred eighty-nine".