4809989 has 4 divisors (see below), whose sum is σ = 4828140. Its totient is φ = 4791840.

The previous prime is 4809977. The next prime is 4810019. The reversal of 4809989 is 9899084.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 940900 + 3869089 = 970^2 + 1967^2 .

It is a cyclic number.

It is not a de Polignac number, because 4809989 - 2²⁰ = 3761413 is a prime.

It is a super-3 number, since 3×4809989³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4809949) 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, 8672 + ... + 9209.

It is an arithmetic number, because the mean of its divisors is an integer number (1207035).

Almost surely, 2^4809989 is an apocalyptic number.

It is an amenable number.

4809989 is a deficient number, since it is larger than the sum of its proper divisors (18151).

4809989 is a wasteful number, since it uses less digits than its factorization.

4809989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18150.

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

The square root of 4809989 is about 2193.1687121606. The cubic root of 4809989 is about 168.8034665513.

The spelling of 4809989 in words is "four million, eight hundred nine thousand, nine hundred eighty-nine".