5605591 has 6 divisors (see below), whose sum is σ = 5668520. Its totient is φ = 5543328.

The previous prime is 5605559. The next prime is 5605619. The reversal of 5605591 is 1955065.

It is a happy number.

It is not a de Polignac number, because 5605591 - 2⁵ = 5605559 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 (5605891) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12550 + ... + 12988.

Almost surely, 2^5605591 is an apocalyptic number.

5605591 is a deficient number, since it is larger than the sum of its proper divisors (62929).

5605591 is an equidigital number, since it uses as much as digits as its factorization.

5605591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665 (or 552 counting only the distinct ones).

The product of its (nonzero) digits is 6750, while the sum is 31.

The square root of 5605591 is about 2367.6129328925. The cubic root of 5605591 is about 177.6398791591.

The spelling of 5605591 in words is "five million, six hundred five thousand, five hundred ninety-one".