5509909 has 4 divisors (see below), whose sum is σ = 5687680. Its totient is φ = 5332140.

The previous prime is 5509897. The next prime is 5509919. The reversal of 5509909 is 9099055.

It is a happy number.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5509909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5509919) 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, 88839 + ... + 88900.

It is an arithmetic number, because the mean of its divisors is an integer number (1421920).

Almost surely, 2^5509909 is an apocalyptic number.

It is an amenable number.

5509909 is a deficient number, since it is larger than the sum of its proper divisors (177771).

5509909 is a wasteful number, since it uses less digits than its factorization.

5509909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177770.

The product of its (nonzero) digits is 18225, while the sum is 37.

The square root of 5509909 is about 2347.3195351294. The cubic root of 5509909 is about 176.6233599004.

The spelling of 5509909 in words is "five million, five hundred nine thousand, nine hundred nine".