43345643 has 4 divisors (see below), whose sum is σ = 47286168. Its totient is φ = 39405120.

The previous prime is 43345619. The next prime is 43345649. The reversal of 43345643 is 34654334.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 43345643 - 2⁶ = 43345579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43345649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1970246 + ... + 1970267.

It is an arithmetic number, because the mean of its divisors is an integer number (11821542).

Almost surely, 2^43345643 is an apocalyptic number.

43345643 is a deficient number, since it is larger than the sum of its proper divisors (3940525).

43345643 is a wasteful number, since it uses less digits than its factorization.

43345643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3940524.

The product of its digits is 51840, while the sum is 32.

The square root of 43345643 is about 6583.7408059552. The cubic root of 43345643 is about 351.2760036135.

Adding to 43345643 its reverse (34654334), we get a palindrome (77999977).

The spelling of 43345643 in words is "forty-three million, three hundred forty-five thousand, six hundred forty-three".