8005591 has 4 divisors (see below), whose sum is σ = 8733384. Its totient is φ = 7277800.

The previous prime is 8005573. The next prime is 8005603. The reversal of 8005591 is 1955008.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8005591 - 2⁵ = 8005559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8005511) 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, 363880 + ... + 363901.

It is an arithmetic number, because the mean of its divisors is an integer number (2183346).

Almost surely, 2^8005591 is an apocalyptic number.

8005591 is a deficient number, since it is larger than the sum of its proper divisors (727793).

8005591 is a wasteful number, since it uses less digits than its factorization.

8005591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727792.

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 8005591 is about 2829.4153106251. The cubic root of 8005591 is about 200.0465808170.

The spelling of 8005591 in words is "eight million, five thousand, five hundred ninety-one".