10809989 has 8 divisors (see below), whose sum is σ = 10977120. Its totient is φ = 10644400.

The previous prime is 10809961. The next prime is 10810001. The reversal of 10809989 is 98990801.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10809989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10809959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23219 + ... + 23679.

It is an arithmetic number, because the mean of its divisors is an integer number (1372140).

Almost surely, 2^10809989 is an apocalyptic number.

It is an amenable number.

10809989 is a deficient number, since it is larger than the sum of its proper divisors (167131).

10809989 is a wasteful number, since it uses less digits than its factorization.

10809989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771.

The product of its (nonzero) digits is 46656, while the sum is 44.

The square root of 10809989 is about 3287.8547717319. The cubic root of 10809989 is about 221.1100166795.

The spelling of 10809989 in words is "ten million, eight hundred nine thousand, nine hundred eighty-nine".