43664743 has 4 divisors (see below), whose sum is σ = 43701840. Its totient is φ = 43627648.

The previous prime is 43664707. The next prime is 43664767. The reversal of 43664743 is 34746634.

43664743 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43664743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43664783) 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, 16723 + ... + 19156.

It is an arithmetic number, because the mean of its divisors is an integer number (10925460).

Almost surely, 2^43664743 is an apocalyptic number.

43664743 is a deficient number, since it is larger than the sum of its proper divisors (37097).

43664743 is a wasteful number, since it uses less digits than its factorization.

43664743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37096.

The product of its digits is 145152, while the sum is 37.

The square root of 43664743 is about 6607.9303113759. The cubic root of 43664743 is about 352.1358995528.

The spelling of 43664743 in words is "forty-three million, six hundred sixty-four thousand, seven hundred forty-three".