5638669 has 4 divisors (see below), whose sum is σ = 5657344. Its totient is φ = 5619996.

The previous prime is 5638663. The next prime is 5638691. The reversal of 5638669 is 9668365.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5638669 - 2¹¹ = 5636621 is a prime.

It is a super-2 number, since 2×5638669² = 63589176183122, 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 (5638663) 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, 8877 + ... + 9490.

It is an arithmetic number, because the mean of its divisors is an integer number (1414336).

Almost surely, 2^5638669 is an apocalyptic number.

It is an amenable number.

5638669 is a deficient number, since it is larger than the sum of its proper divisors (18675).

5638669 is a wasteful number, since it uses less digits than its factorization.

5638669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18674.

The product of its digits is 233280, while the sum is 43.

The square root of 5638669 is about 2374.5881748211. The cubic root of 5638669 is about 177.9886055072.

The spelling of 5638669 in words is "five million, six hundred thirty-eight thousand, six hundred sixty-nine".