5638997 has 8 divisors (see below), whose sum is σ = 6940416. Its totient is φ = 4461552.

The previous prime is 5638967. The next prime is 5639003. The reversal of 5638997 is 7998365.

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 5638997 - 2¹⁶ = 5573461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5638957) 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, 30893 + ... + 31074.

It is an arithmetic number, because the mean of its divisors is an integer number (867552).

Almost surely, 2^5638997 is an apocalyptic number.

It is an amenable number.

5638997 is a deficient number, since it is larger than the sum of its proper divisors (1301419).

5638997 is a wasteful number, since it uses less digits than its factorization.

5638997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61987.

The product of its digits is 408240, while the sum is 47.

The square root of 5638997 is about 2374.6572384241. The cubic root of 5638997 is about 177.9920566249.

The spelling of 5638997 in words is "five million, six hundred thirty-eight thousand, nine hundred ninety-seven".