4491853 has 4 divisors (see below), whose sum is σ = 4502140. Its totient is φ = 4481568.

The previous prime is 4491841. The next prime is 4491871. The reversal of 4491853 is 3581944.

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 3992004 + 499849 = 1998^2 + 707^2 .

It is a cyclic number.

It is not a de Polignac number, because 4491853 - 2⁹ = 4491341 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 (4491833) 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, 4458 + ... + 5371.

It is an arithmetic number, because the mean of its divisors is an integer number (1125535).

Almost surely, 2^4491853 is an apocalyptic number.

It is an amenable number.

4491853 is a deficient number, since it is larger than the sum of its proper divisors (10287).

4491853 is an equidigital number, since it uses as much as digits as its factorization.

4491853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10286.

The product of its digits is 17280, while the sum is 34.

The square root of 4491853 is about 2119.3992073227. The cubic root of 4491853 is about 164.9966696604.

Subtracting from 4491853 its reverse (3581944), we obtain a palindrome (909909).

The spelling of 4491853 in words is "four million, four hundred ninety-one thousand, eight hundred fifty-three".