1089169 has 4 divisors (see below), whose sum is σ = 1118644. Its totient is φ = 1059696.

The previous prime is 1089161. The next prime is 1089191. The reversal of 1089169 is 9619801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9619801 = 761 ⋅12641.

It can be written as a sum of positive squares in 2 ways, for example, as 1024144 + 65025 = 1012^2 + 255^2 .

It is a cyclic number.

It is not a de Polignac number, because 1089169 - 2³ = 1089161 is a prime.

It is a super-2 number, since 2×1089169² = 2372578221122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1089161) 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, 14682 + ... + 14755.

It is an arithmetic number, because the mean of its divisors is an integer number (279661).

2^1089169 is an apocalyptic number.

It is an amenable number.

1089169 is a deficient number, since it is larger than the sum of its proper divisors (29475).

1089169 is an equidigital number, since it uses as much as digits as its factorization.

1089169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29474.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 1089169 is about 1043.6325981877. The cubic root of 1089169 is about 102.8880865710. Note that the first 3 decimals are identical.

It can be divided in two parts, 1089 and 169, that multiplied together give a square (184041 = 429²).

The spelling of 1089169 in words is "one million, eighty-nine thousand, one hundred sixty-nine".