5518909 has 4 divisors (see below), whose sum is σ = 6020640. Its totient is φ = 5017180.

The previous prime is 5518859. The next prime is 5518913. The reversal of 5518909 is 9098155.

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 not a de Polignac number, because 5518909 - 2⁹ = 5518397 is a prime.

It is a Duffinian number.

5518909 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5518109) 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, 250849 + ... + 250870.

It is an arithmetic number, because the mean of its divisors is an integer number (1505160).

Almost surely, 2^5518909 is an apocalyptic number.

It is an amenable number.

5518909 is a deficient number, since it is larger than the sum of its proper divisors (501731).

5518909 is a wasteful number, since it uses less digits than its factorization.

5518909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501730.

The product of its (nonzero) digits is 16200, while the sum is 37.

The square root of 5518909 is about 2349.2358332019. The cubic root of 5518909 is about 176.7194743445.

The spelling of 5518909 in words is "five million, five hundred eighteen thousand, nine hundred nine".