43636073 has 8 divisors (see below), whose sum is σ = 47061000. Its totient is φ = 40220928.

The previous prime is 43636067. The next prime is 43636081. The reversal of 43636073 is 37063634.

It can be written as a sum of positive squares in 4 ways, for example, as 444889 + 43191184 = 667^2 + 6572^2 .

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 43636073 - 2⁶ = 43636009 is a prime.

It is a super-2 number, since 2×43636073² = 3808213733722658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43636063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8753 + ... + 12801.

It is an arithmetic number, because the mean of its divisors is an integer number (5882625).

Almost surely, 2^43636073 is an apocalyptic number.

It is an amenable number.

43636073 is a deficient number, since it is larger than the sum of its proper divisors (3424927).

43636073 is a wasteful number, since it uses less digits than its factorization.

43636073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4891.

The product of its (nonzero) digits is 27216, while the sum is 32.

The square root of 43636073 is about 6605.7605920893. The cubic root of 43636073 is about 352.0588125946.

The spelling of 43636073 in words is "forty-three million, six hundred thirty-six thousand, seventy-three".