5105209 has 4 divisors (see below), whose sum is σ = 5109840. Its totient is φ = 5100580.

The previous prime is 5105203. The next prime is 5105231. The reversal of 5105209 is 9025015.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9025015 = 5 ⋅1805003.

It is a cyclic number.

It is not a de Polignac number, because 5105209 - 2¹³ = 5097017 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5105209.

It is not an unprimeable number, because it can be changed into a prime (5105203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 402 + ... + 3220.

It is an arithmetic number, because the mean of its divisors is an integer number (1277460).

Almost surely, 2^5105209 is an apocalyptic number.

It is an amenable number.

5105209 is a deficient number, since it is larger than the sum of its proper divisors (4631).

5105209 is a wasteful number, since it uses less digits than its factorization.

5105209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4630.

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 5105209 is about 2259.4709557770. The cubic root of 5105209 is about 172.1886451055.

The spelling of 5105209 in words is "five million, one hundred five thousand, two hundred nine".