9944591 has 4 divisors (see below), whose sum is σ = 10187184. Its totient is φ = 9702000.

The previous prime is 9944569. The next prime is 9944617. The reversal of 9944591 is 1954499.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1954499 = 677 ⋅2887.

It is a cyclic number.

It is not a de Polignac number, because 9944591 - 2¹⁴ = 9928207 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 242551 = 9944591 / (9 + 9 + 4 + 4 + 5 + 9 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9944531) 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, 121235 + ... + 121316.

It is an arithmetic number, because the mean of its divisors is an integer number (2546796).

Almost surely, 2^9944591 is an apocalyptic number.

9944591 is a deficient number, since it is larger than the sum of its proper divisors (242593).

9944591 is a wasteful number, since it uses less digits than its factorization.

9944591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242592.

The product of its digits is 58320, while the sum is 41.

The square root of 9944591 is about 3153.5045584238. The cubic root of 9944591 is about 215.0448148874.

The spelling of 9944591 in words is "nine million, nine hundred forty-four thousand, five hundred ninety-one".