10809889 has 4 divisors (see below), whose sum is σ = 10911024. Its totient is φ = 10708756.

The previous prime is 10809881. The next prime is 10809893. The reversal of 10809889 is 98890801.

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: 98890801 = 19 ⋅5204779.

It is a cyclic number.

It is not a de Polignac number, because 10809889 - 2³ = 10809881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10809881) 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, 50407 + ... + 50620.

It is an arithmetic number, because the mean of its divisors is an integer number (2727756).

Almost surely, 2^10809889 is an apocalyptic number.

It is an amenable number.

10809889 is a deficient number, since it is larger than the sum of its proper divisors (101135).

10809889 is a wasteful number, since it uses less digits than its factorization.

10809889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101134.

The product of its (nonzero) digits is 41472, while the sum is 43.

The square root of 10809889 is about 3287.8395642123. The cubic root of 10809889 is about 221.1093348697.

The spelling of 10809889 in words is "ten million, eight hundred nine thousand, eight hundred eighty-nine".