4989989 has 8 divisors (see below), whose sum is σ = 5285280. Its totient is φ = 4698000.

The previous prime is 4989979. The next prime is 4989991. The reversal of 4989989 is 9899894.

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 4989989 - 2⁴ = 4989973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4989949) 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, 2714 + ... + 4164.

It is an arithmetic number, because the mean of its divisors is an integer number (660660).

Almost surely, 2^4989989 is an apocalyptic number.

It is an amenable number.

4989989 is a deficient number, since it is larger than the sum of its proper divisors (295291).

4989989 is a wasteful number, since it uses less digits than its factorization.

4989989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1651.

The product of its digits is 1679616, while the sum is 56.

The square root of 4989989 is about 2233.8283282294. The cubic root of 4989989 is about 170.8833946219.

The spelling of 4989989 in words is "four million, nine hundred eighty-nine thousand, nine hundred eighty-nine".