43691066 has 4 divisors (see below), whose sum is σ = 65536602. Its totient is φ = 21845532.

The previous prime is 43690993. The next prime is 43691113. The reversal of 43691066 is 66019634.

43691066 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 can be written as a sum of positive squares in only one way, i.e., 42055225 + 1635841 = 6485^2 + 1279^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 10922765 + ... + 10922768.

Almost surely, 2^43691066 is an apocalyptic number.

43691066 is a deficient number, since it is larger than the sum of its proper divisors (21845536).

43691066 is a wasteful number, since it uses less digits than its factorization.

43691066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21845535.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 43691066 is about 6609.9217847112. The cubic root of 43691066 is about 352.2066462669.

The spelling of 43691066 in words is "forty-three million, six hundred ninety-one thousand, sixty-six".