5209209 has 12 divisors (see below), whose sum is σ = 7767552. Its totient is φ = 3360600.

The previous prime is 5209177. The next prime is 5209279. The reversal of 5209209 is 9029025.

It is not a de Polignac number, because 5209209 - 2⁵ = 5209177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5209279) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9057 + ... + 9614.

It is an arithmetic number, because the mean of its divisors is an integer number (647296).

Almost surely, 2^5209209 is an apocalyptic number.

It is an amenable number.

5209209 is a deficient number, since it is larger than the sum of its proper divisors (2558343).

5209209 is a wasteful number, since it uses less digits than its factorization.

5209209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18708 (or 18705 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 5209209 is about 2282.3691638296. The cubic root of 5209209 is about 173.3500324970.

The spelling of 5209209 in words is "five million, two hundred nine thousand, two hundred nine".