5635591 has 4 divisors (see below), whose sum is σ = 6069112. Its totient is φ = 5202072.

The previous prime is 5635589. The next prime is 5635601. The reversal of 5635591 is 1955365.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1955365 = 5 ⋅391073.

It is a cyclic number.

It is not a de Polignac number, because 5635591 - 2¹ = 5635589 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 (5635501) 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, 216741 + ... + 216766.

It is an arithmetic number, because the mean of its divisors is an integer number (1517278).

Almost surely, 2^5635591 is an apocalyptic number.

5635591 is a deficient number, since it is larger than the sum of its proper divisors (433521).

5635591 is a wasteful number, since it uses less digits than its factorization.

5635591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433520.

The product of its digits is 20250, while the sum is 34.

The square root of 5635591 is about 2373.9399739673. The cubic root of 5635591 is about 177.9562131912.

It can be divided in two parts, 5635 and 591, that added together give a palindrome (6226).

The spelling of 5635591 in words is "five million, six hundred thirty-five thousand, five hundred ninety-one".