4493891 has 4 divisors (see below), whose sum is σ = 4561032. Its totient is φ = 4426752.

The previous prime is 4493873. The next prime is 4493921. The reversal of 4493891 is 1983944.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4493891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4493821) 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, 33470 + ... + 33603.

It is an arithmetic number, because the mean of its divisors is an integer number (1140258).

Almost surely, 2^4493891 is an apocalyptic number.

4493891 is a deficient number, since it is larger than the sum of its proper divisors (67141).

4493891 is an equidigital number, since it uses as much as digits as its factorization.

4493891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67140.

The product of its digits is 31104, while the sum is 38.

The square root of 4493891 is about 2119.8799494311. The cubic root of 4493891 is about 165.0216194506.

The spelling of 4493891 in words is "four million, four hundred ninety-three thousand, eight hundred ninety-one".