43040073 has 16 divisors (see below), whose sum is σ = 63961920. Its totient is φ = 25583616.

The previous prime is 43040029. The next prime is 43040077. The reversal of 43040073 is 37004034.

It is not a de Polignac number, because 43040073 - 2⁶ = 43040009 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (43040077) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21240 + ... + 23177.

It is an arithmetic number, because the mean of its divisors is an integer number (3997620).

Almost surely, 2^43040073 is an apocalyptic number.

It is an amenable number.

43040073 is a deficient number, since it is larger than the sum of its proper divisors (20921847).

43040073 is a wasteful number, since it uses less digits than its factorization.

43040073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44456.

The product of its (nonzero) digits is 1008, while the sum is 21.

The square root of 43040073 is about 6560.4933503510. The cubic root of 43040073 is about 350.4486030009.

The spelling of 43040073 in words is "forty-three million, forty thousand, seventy-three".