4801809 has 4 divisors (see below), whose sum is σ = 6402416. Its totient is φ = 3201204.

The previous prime is 4801793. The next prime is 4801829. The reversal of 4801809 is 9081084.

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 not a de Polignac number, because 4801809 - 2⁴ = 4801793 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

4801809 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4801829) 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, 800299 + ... + 800304.

It is an arithmetic number, because the mean of its divisors is an integer number (1600604).

Almost surely, 2^4801809 is an apocalyptic number.

It is an amenable number.

4801809 is a deficient number, since it is larger than the sum of its proper divisors (1600607).

4801809 is a wasteful number, since it uses less digits than its factorization.

4801809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1600606.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 4801809 is about 2191.3030370079. The cubic root of 4801809 is about 168.7077216445.

Subtracting 4801809 from its reverse (9081084), we obtain a triangular number (4279275 = T₂₉₂₅).

The spelling of 4801809 in words is "four million, eight hundred one thousand, eight hundred nine".