43489729 has 4 divisors (see below), whose sum is σ = 43561984. Its totient is φ = 43417476.

The previous prime is 43489717. The next prime is 43489739. The reversal of 43489729 is 92798434.

It is a happy number.

43489729 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 43489729 - 2⁷ = 43489601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43489739) 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, 35217 + ... + 36430.

It is an arithmetic number, because the mean of its divisors is an integer number (10890496).

Almost surely, 2^43489729 is an apocalyptic number.

It is an amenable number.

43489729 is a deficient number, since it is larger than the sum of its proper divisors (72255).

43489729 is an equidigital number, since it uses as much as digits as its factorization.

43489729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72254.

The product of its digits is 435456, while the sum is 46.

The square root of 43489729 is about 6594.6742906682. The cubic root of 43489729 is about 351.6648006709.

The spelling of 43489729 in words is "forty-three million, four hundred eighty-nine thousand, seven hundred twenty-nine".