89109 has 6 divisors (see below), whose sum is σ = 128726. Its totient is φ = 59400.

The previous prime is 89107. The next prime is 89113. The reversal of 89109 is 90198.

It can be written as a sum of positive squares in only one way, i.e., 88209 + 900 = 297^2 + 30^2 .

It is not a de Polignac number, because 89109 - 2¹ = 89107 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89101) 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, 4942 + ... + 4959.

2⁸⁹¹⁰⁹ is an apocalyptic number.

It is an amenable number.

89109 is a deficient number, since it is larger than the sum of its proper divisors (39617).

89109 is a wasteful number, since it uses less digits than its factorization.

89109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9907 (or 9904 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 89109 is about 298.5113063185. The cubic root of 89109 is about 44.6656703820.

Subtracting 89109 from its reverse (90198), we obtain a square (1089 = 33²).

The spelling of 89109 in words is "eighty-nine thousand, one hundred nine".