5591591 has 8 divisors (see below), whose sum is σ = 5778960. Its totient is φ = 5406912.

The previous prime is 5591587. The next prime is 5591609. The reversal of 5591591 is 1951955.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5591591 - 2² = 5591587 is a prime.

It is a super-2 number, since 2×5591591² = 62531779822562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5591791) 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 7 ways as a sum of consecutive naturals, for example, 4091 + ... + 5283.

It is an arithmetic number, because the mean of its divisors is an integer number (722370).

Almost surely, 2^5591591 is an apocalyptic number.

5591591 is a deficient number, since it is larger than the sum of its proper divisors (187369).

5591591 is a wasteful number, since it uses less digits than its factorization.

5591591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345.

The product of its digits is 10125, while the sum is 35.

The square root of 5591591 is about 2364.6545202207. The cubic root of 5591591 is about 177.4918702882.

The spelling of 5591591 in words is "five million, five hundred ninety-one thousand, five hundred ninety-one".