9994591 has 4 divisors (see below), whose sum is σ = 10143832. Its totient is φ = 9845352.

The previous prime is 9994573. The next prime is 9994603. The reversal of 9994591 is 1954999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1954999 = 257 ⋅7607.

It is a cyclic number.

It is not a de Polignac number, because 9994591 - 2⁵ = 9994559 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 (9994091) 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, 74520 + ... + 74653.

It is an arithmetic number, because the mean of its divisors is an integer number (2535958).

Almost surely, 2^9994591 is an apocalyptic number.

9994591 is a deficient number, since it is larger than the sum of its proper divisors (149241).

9994591 is a wasteful number, since it uses less digits than its factorization.

9994591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149240.

The product of its digits is 131220, while the sum is 46.

The square root of 9994591 is about 3161.4223064943. The cubic root of 9994591 is about 215.4046175400.

It can be divided in two parts, 9994 and 591, that added together give a triangular number (10585 = T₁₄₅).

The spelling of 9994591 in words is "nine million, nine hundred ninety-four thousand, five hundred ninety-one".