6444091 has 4 divisors (see below), whose sum is σ = 6449184. Its totient is φ = 6439000.

The previous prime is 6444083. The next prime is 6444121. The reversal of 6444091 is 1904446.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6444091 - 2³ = 6444083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6444041) 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, 981 + ... + 3721.

It is an arithmetic number, because the mean of its divisors is an integer number (1612296).

Almost surely, 2^6444091 is an apocalyptic number.

6444091 is a deficient number, since it is larger than the sum of its proper divisors (5093).

6444091 is a wasteful number, since it uses less digits than its factorization.

6444091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5092.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 6444091 is about 2538.5214200396. The cubic root of 6444091 is about 186.0889369257.

The spelling of 6444091 in words is "six million, four hundred forty-four thousand, ninety-one".