5643237 has 4 divisors (see below), whose sum is σ = 7524320. Its totient is φ = 3762156.

The previous prime is 5643227. The next prime is 5643241. The reversal of 5643237 is 7323465.

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 not a de Polignac number, because 5643237 - 2⁴ = 5643221 is a prime.

It is a super-2 number, since 2×5643237² = 63692247676338, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

5643237 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5643217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 940537 + ... + 940542.

It is an arithmetic number, because the mean of its divisors is an integer number (1881080).

Almost surely, 2^5643237 is an apocalyptic number.

It is an amenable number.

5643237 is a deficient number, since it is larger than the sum of its proper divisors (1881083).

5643237 is a wasteful number, since it uses less digits than its factorization.

5643237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1881082.

The product of its digits is 15120, while the sum is 30.

The square root of 5643237 is about 2375.5498310917. The cubic root of 5643237 is about 178.0366565923.

The spelling of 5643237 in words is "five million, six hundred forty-three thousand, two hundred thirty-seven".