5438209 has 4 divisors (see below), whose sum is σ = 6215104. Its totient is φ = 4661316.

The previous prime is 5438183. The next prime is 5438219. The reversal of 5438209 is 9028345.

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 5438209 - 2⁵ = 5438177 is a prime.

5438209 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (5438219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 388437 + ... + 388450.

It is an arithmetic number, because the mean of its divisors is an integer number (1553776).

Almost surely, 2^5438209 is an apocalyptic number.

It is an amenable number.

5438209 is a deficient number, since it is larger than the sum of its proper divisors (776895).

5438209 is an equidigital number, since it uses as much as digits as its factorization.

5438209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776894.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 5438209 is about 2331.9967838743. The cubic root of 5438209 is about 175.8538839787.

The spelling of 5438209 in words is "five million, four hundred thirty-eight thousand, two hundred nine".