4909889 has 4 divisors (see below), whose sum is σ = 5198724. Its totient is φ = 4621056.

The previous prime is 4909871. The next prime is 4909939. The reversal of 4909889 is 9889094.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9889094 = 2 ⋅4944547.

It can be written as a sum of positive squares in 2 ways, for example, as 4431025 + 478864 = 2105^2 + 692^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4909889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4909859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144392 + ... + 144425.

It is an arithmetic number, because the mean of its divisors is an integer number (1299681).

Almost surely, 2^4909889 is an apocalyptic number.

It is an amenable number.

4909889 is a deficient number, since it is larger than the sum of its proper divisors (288835).

4909889 is a wasteful number, since it uses less digits than its factorization.

4909889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288834.

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

The square root of 4909889 is about 2215.8269336751. The cubic root of 4909889 is about 169.9641100706.

The spelling of 4909889 in words is "four million, nine hundred nine thousand, eight hundred eighty-nine".