109009 has 4 divisors (see below), whose sum is σ = 110704. Its totient is φ = 107316.

The previous prime is 109001. The next prime is 109013. The reversal of 109009 is 900901.

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: 900901 = 163 ⋅5527.

It is a cyclic number.

It is not a de Polignac number, because 109009 - 2³ = 109001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109001) 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, 747 + ... + 880.

It is an arithmetic number, because the mean of its divisors is an integer number (27676).

2¹⁰⁹⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

109009 is a deficient number, since it is larger than the sum of its proper divisors (1695).

109009 is an equidigital number, since it uses as much as digits as its factorization.

109009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1694.

The product of its (nonzero) digits is 81, while the sum is 19.

The square root of 109009 is about 330.1651102100. The cubic root of 109009 is about 47.7698765052.

The spelling of 109009 in words is "one hundred nine thousand, nine".