1089189 has 6 divisors (see below), whose sum is σ = 1573286. Its totient is φ = 726120.

The previous prime is 1089161. The next prime is 1089191. The reversal of 1089189 is 9819801.

It can be written as a sum of positive squares in only one way, i.e., 613089 + 476100 = 783^2 + 690^2 .

It is not a de Polignac number, because 1089189 - 2⁸ = 1088933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1082189) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 60502 + ... + 60519.

2^1089189 is an apocalyptic number.

It is an amenable number.

1089189 is a deficient number, since it is larger than the sum of its proper divisors (484097).

1089189 is a wasteful number, since it uses less digits than its factorization.

1089189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121027 (or 121024 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The square root of 1089189 is about 1043.6421800598. The cubic root of 1089189 is about 102.8887163322. Note that the first 3 decimals are identical.

The spelling of 1089189 in words is "one million, eighty-nine thousand, one hundred eighty-nine".