10809729 has 12 divisors (see below), whose sum is σ = 17844736. Its totient is φ = 6176952.

The previous prime is 10809709. The next prime is 10809769. The reversal of 10809729 is 92790801.

It is a happy number.

It is not a de Polignac number, because 10809729 - 2⁵ = 10809697 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10809693 and 10809702.

It is not an unprimeable number, because it can be changed into a prime (10809709) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85729 + ... + 85854.

Almost surely, 2^10809729 is an apocalyptic number.

It is an amenable number.

10809729 is a deficient number, since it is larger than the sum of its proper divisors (7035007).

10809729 is a wasteful number, since it uses less digits than its factorization.

10809729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171596 (or 171593 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 10809729 is about 3287.8152320348. The cubic root of 10809729 is about 221.1082439653.

The spelling of 10809729 in words is "ten million, eight hundred nine thousand, seven hundred twenty-nine".