4989809 has 8 divisors (see below), whose sum is σ = 5520960. Its totient is φ = 4471600.

The previous prime is 4989797. The next prime is 4989811. The reversal of 4989809 is 9089894.

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

It is a cyclic number.

It is not a de Polignac number, because 4989809 - 2²⁰ = 3941233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4989209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2414 + ... + 3975.

It is an arithmetic number, because the mean of its divisors is an integer number (690120).

Almost surely, 2^4989809 is an apocalyptic number.

It is an amenable number.

4989809 is a deficient number, since it is larger than the sum of its proper divisors (531151).

4989809 is a wasteful number, since it uses less digits than its factorization.

4989809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6471.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 4989809 is about 2233.7880382883. The cubic root of 4989809 is about 170.8813398825.

The spelling of 4989809 in words is "four million, nine hundred eighty-nine thousand, eight hundred nine".