10809309 has 16 divisors (see below), whose sum is σ = 17338880. Its totient is φ = 5851440.

The previous prime is 10809307. The next prime is 10809343. The reversal of 10809309 is 90390801.

It is a happy number.

It is not a de Polignac number, because 10809309 - 2¹ = 10809307 is a prime.

It is a super-2 number, since 2×10809309² = 233682322114962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10809301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13147 + ... + 13944.

It is an arithmetic number, because the mean of its divisors is an integer number (1083680).

Almost surely, 2^10809309 is an apocalyptic number.

10809309 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

10809309 is a deficient number, since it is larger than the sum of its proper divisors (6529571).

10809309 is a wasteful number, since it uses less digits than its factorization.

10809309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27120.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 10809309 is about 3287.7513592119. The cubic root of 10809309 is about 221.1053802899.

The spelling of 10809309 in words is "ten million, eight hundred nine thousand, three hundred nine".