4491889 has 4 divisors (see below), whose sum is σ = 4512256. Its totient is φ = 4471524.

The previous prime is 4491887. The next prime is 4491899. The reversal of 4491889 is 9881944.

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 a cyclic number.

It is not a de Polignac number, because 4491889 - 2¹ = 4491887 is a prime.

It is a Duffinian number.

4491889 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4491887) 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, 9849 + ... + 10294.

It is an arithmetic number, because the mean of its divisors is an integer number (1128064).

Almost surely, 2^4491889 is an apocalyptic number.

It is an amenable number.

4491889 is a deficient number, since it is larger than the sum of its proper divisors (20367).

4491889 is a wasteful number, since it uses less digits than its factorization.

4491889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20366.

The product of its digits is 82944, while the sum is 43.

The square root of 4491889 is about 2119.4077002785. The cubic root of 4491889 is about 164.9971104483.

The spelling of 4491889 in words is "four million, four hundred ninety-one thousand, eight hundred eighty-nine".