5109809 has 6 divisors (see below), whose sum is σ = 5428374. Its totient is φ = 4808960.

The previous prime is 5109791. The next prime is 5109821. The reversal of 5109809 is 9089015.

It can be written as a sum of positive squares in 3 ways, for example, as 1488400 + 3621409 = 1220^2 + 1903^2 .

It is not a de Polignac number, because 5109809 - 2⁸ = 5109553 is a prime.

It is a super-2 number, since 2×5109809² = 52220296032962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5109859) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8552 + ... + 9129.

It is an arithmetic number, because the mean of its divisors is an integer number (904729).

Almost surely, 2^5109809 is an apocalyptic number.

It is an amenable number.

5109809 is a deficient number, since it is larger than the sum of its proper divisors (318565).

5109809 is a wasteful number, since it uses less digits than its factorization.

5109809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17715 (or 17698 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 32.

The square root of 5109809 is about 2260.4886639840. The cubic root of 5109809 is about 172.2403458940.

The spelling of 5109809 in words is "five million, one hundred nine thousand, eight hundred nine".