4805209 has 4 divisors (see below), whose sum is σ = 4872960. Its totient is φ = 4737460.

The previous prime is 4805191. The next prime is 4805231. The reversal of 4805209 is 9025084.

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 not a de Polignac number, because 4805209 - 2⁹ = 4804697 is a prime.

It is a Duffinian number.

4805209 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4805249) 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, 33769 + ... + 33910.

It is an arithmetic number, because the mean of its divisors is an integer number (1218240).

Almost surely, 2^4805209 is an apocalyptic number.

It is an amenable number.

4805209 is a deficient number, since it is larger than the sum of its proper divisors (67751).

4805209 is an equidigital number, since it uses as much as digits as its factorization.

4805209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67750.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 4805209 is about 2192.0786938429. The cubic root of 4805209 is about 168.7475310110.

The spelling of 4805209 in words is "four million, eight hundred five thousand, two hundred nine".