104005591 has 4 divisors (see below), whose sum is σ = 104061384. Its totient is φ = 103949800.

The previous prime is 104005579. The next prime is 104005607. The reversal of 104005591 is 195500401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 195500401 = 47 ⋅4159583.

It is a cyclic number.

It is not a de Polignac number, because 104005591 - 2¹⁵ = 103972823 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 (104000591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25000 + ... + 28861.

It is an arithmetic number, because the mean of its divisors is an integer number (26015346).

Almost surely, 2^104005591 is an apocalyptic number.

104005591 is a deficient number, since it is larger than the sum of its proper divisors (55793).

104005591 is an equidigital number, since it uses as much as digits as its factorization.

104005591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55792.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 104005591 is about 10198.3131448294. The cubic root of 104005591 is about 470.2753645164.

Adding to 104005591 its reverse (195500401), we get a palindrome (299505992).

The spelling of 104005591 in words is "one hundred four million, five thousand, five hundred ninety-one".