4909809 has 8 divisors (see below), whose sum is σ = 6891040. Its totient is φ = 3100896.

The previous prime is 4909781. The next prime is 4909823. The reversal of 4909809 is 9089094.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4909809 - 2¹¹ = 4907761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4909859) 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 7 ways as a sum of consecutive naturals, for example, 43012 + ... + 43125.

It is an arithmetic number, because the mean of its divisors is an integer number (861380).

Almost surely, 2^4909809 is an apocalyptic number.

It is an amenable number.

4909809 is a deficient number, since it is larger than the sum of its proper divisors (1981231).

4909809 is a wasteful number, since it uses less digits than its factorization.

4909809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86159.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 4909809 is about 2215.8088816502. The cubic root of 4909809 is about 169.9631869538.

The spelling of 4909809 in words is "four million, nine hundred nine thousand, eight hundred nine".