43740685 has 4 divisors (see below), whose sum is σ = 52488828. Its totient is φ = 34992544.

The previous prime is 43740617. The next prime is 43740689. The reversal of 43740685 is 58604734.

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

It can be written as a sum of positive squares in 2 ways, for example, as 33767721 + 9972964 = 5811^2 + 3158^2 .

It is a cyclic number.

It is not a de Polignac number, because 43740685 - 2⁹ = 43740173 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 (43740689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4374064 + ... + 4374073.

It is an arithmetic number, because the mean of its divisors is an integer number (13122207).

Almost surely, 2^43740685 is an apocalyptic number.

It is an amenable number.

43740685 is a deficient number, since it is larger than the sum of its proper divisors (8748143).

43740685 is an equidigital number, since it uses as much as digits as its factorization.

43740685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8748142.

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 43740685 is about 6613.6740923635. The cubic root of 43740685 is about 352.3399269853.

The spelling of 43740685 in words is "forty-three million, seven hundred forty thousand, six hundred eighty-five".