44991 has 6 divisors (see below), whose sum is σ = 65000. Its totient is φ = 29988.

The previous prime is 44987. The next prime is 45007. The reversal of 44991 is 19944.

It is not a de Polignac number, because 44991 - 2² = 44987 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2491 + ... + 2508.

2⁴⁴⁹⁹¹ is an apocalyptic number.

44991 is a deficient number, since it is larger than the sum of its proper divisors (20009).

44991 is a wasteful number, since it uses less digits than its factorization.

44991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5005 (or 5002 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 44991 is about 212.1108200918. The cubic root of 44991 is about 35.5665616246.

It can be divided in two parts, 44 and 991, that added together give a triangular number (1035 = T₄₅).

The spelling of 44991 in words is "forty-four thousand, nine hundred ninety-one".