43391066 has 8 divisors (see below), whose sum is σ = 65910720. Its totient is φ = 21420828.

The previous prime is 43391063. The next prime is 43391081. The reversal of 43391066 is 66019334.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (43391063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137156 + ... + 137471.

It is an arithmetic number, because the mean of its divisors is an integer number (8238840).

Almost surely, 2^43391066 is an apocalyptic number.

43391066 is a deficient number, since it is larger than the sum of its proper divisors (22519654).

43391066 is a wasteful number, since it uses less digits than its factorization.

43391066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274708.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 43391066 is about 6587.1895372761. The cubic root of 43391066 is about 351.3986644584.

The spelling of 43391066 in words is "forty-three million, three hundred ninety-one thousand, sixty-six".