43749641 has 8 divisors (see below), whose sum is σ = 47645640. Its totient is φ = 39929472.

The previous prime is 43749637. The next prime is 43749659. The reversal of 43749641 is 14694734.

It can be written as a sum of positive squares in 4 ways, for example, as 5359225 + 38390416 = 2315^2 + 6196^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 43749641 - 2² = 43749637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 43749595 and 43749604.

It is not an unprimeable number, because it can be changed into a prime (43749631) 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 7 ways as a sum of consecutive naturals, for example, 17750 + ... + 20063.

It is an arithmetic number, because the mean of its divisors is an integer number (5955705).

Almost surely, 2^43749641 is an apocalyptic number.

It is an amenable number.

43749641 is a deficient number, since it is larger than the sum of its proper divisors (3895999).

43749641 is a wasteful number, since it uses less digits than its factorization.

43749641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37915.

The product of its digits is 72576, while the sum is 38.

The square root of 43749641 is about 6614.3511397566. The cubic root of 43749641 is about 352.3639727986.

The spelling of 43749641 in words is "forty-three million, seven hundred forty-nine thousand, six hundred forty-one".