5645943 has 20 divisors (see below), whose sum is σ = 8635528. Its totient is φ = 3674160.

The previous prime is 5645917. The next prime is 5645947. The reversal of 5645943 is 3495465.

It is a happy number.

5645943 is a `hidden beast` number, since 5 + 64 + 594 + 3 = 666.

It is not a de Polignac number, because 5645943 - 2⁵ = 5645911 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5645898 and 5645907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5645947) 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 19 ways as a sum of consecutive naturals, for example, 2673 + ... + 4293.

Almost surely, 2^5645943 is an apocalyptic number.

5645943 is a deficient number, since it is larger than the sum of its proper divisors (2989585).

5645943 is a wasteful number, since it uses less digits than its factorization.

5645943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1676 (or 1667 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 5645943 is about 2376.1193151860. The cubic root of 5645943 is about 178.0651089509.

It can be divided in two parts, 5645 and 943, that multiplied together give a palindrome (5323235).

The spelling of 5645943 in words is "five million, six hundred forty-five thousand, nine hundred forty-three".