5643729 has 32 divisors (see below), whose sum is σ = 10295040. Its totient is φ = 2975616.

The previous prime is 5643727. The next prime is 5643733. The reversal of 5643729 is 9273465.

5643729 is a `hidden beast` number, since 5 + 643 + 7 + 2 + 9 = 666.

It is not a de Polignac number, because 5643729 - 2¹ = 5643727 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5643693 and 5643702.

It is not an unprimeable number, because it can be changed into a prime (5643727) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1309 + ... + 3605.

It is an arithmetic number, because the mean of its divisors is an integer number (321720).

Almost surely, 2^5643729 is an apocalyptic number.

It is an amenable number.

5643729 is a deficient number, since it is larger than the sum of its proper divisors (4651311).

5643729 is a wasteful number, since it uses less digits than its factorization.

5643729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2326 (or 2320 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 5643729 is about 2375.6533838083. The cubic root of 5643729 is about 178.0418304248.

The spelling of 5643729 in words is "five million, six hundred forty-three thousand, seven hundred twenty-nine".