5643861 has 8 divisors (see below), whose sum is σ = 7631424. Its totient is φ = 3709440.

The previous prime is 5643857. The next prime is 5643877. The reversal of 5643861 is 1683465.

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

It is not a de Polignac number, because 5643861 - 2² = 5643857 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5643821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13036 + ... + 13461.

It is an arithmetic number, because the mean of its divisors is an integer number (953928).

Almost surely, 2^5643861 is an apocalyptic number.

It is an amenable number.

5643861 is a deficient number, since it is larger than the sum of its proper divisors (1987563).

5643861 is a wasteful number, since it uses less digits than its factorization.

5643861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26571.

The product of its digits is 17280, while the sum is 33.

The square root of 5643861 is about 2375.6811654765. The cubic root of 5643861 is about 178.0432184751.

The spelling of 5643861 in words is "five million, six hundred forty-three thousand, eight hundred sixty-one".