4407991 has 6 divisors (see below), whose sum is σ = 5127720. Its totient is φ = 3778236.

The previous prime is 4407967. The next prime is 4408007. The reversal of 4407991 is 1997044.

It is not a de Polignac number, because 4407991 - 2⁹ = 4407479 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 (4407961) 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 5 ways as a sum of consecutive naturals, for example, 44931 + ... + 45028.

It is an arithmetic number, because the mean of its divisors is an integer number (854620).

Almost surely, 2^4407991 is an apocalyptic number.

4407991 is a deficient number, since it is larger than the sum of its proper divisors (719729).

4407991 is an equidigital number, since it uses as much as digits as its factorization.

4407991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89973 (or 89966 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 4407991 is about 2099.5216121774. The cubic root of 4407991 is about 163.9633940706.

The spelling of 4407991 in words is "four million, four hundred seven thousand, nine hundred ninety-one".