43688933 has 2 divisors, whose sum is σ = 43688934. Its totient is φ = 43688932.

The previous prime is 43688921. The next prime is 43688977. The reversal of 43688933 is 33988634.

It is an a-pointer prime, because the next prime (43688977) can be obtained adding 43688933 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22877089 + 20811844 = 4783^2 + 4562^2 .

It is a cyclic number.

It is not a de Polignac number, because 43688933 - 2⁴ = 43688917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43688833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21844466 + 21844467.

It is an arithmetic number, because the mean of its divisors is an integer number (21844467).

Almost surely, 2^43688933 is an apocalyptic number.

It is an amenable number.

43688933 is a deficient number, since it is larger than the sum of its proper divisors (1).

43688933 is an equidigital number, since it uses as much as digits as its factorization.

43688933 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 44.

The square root of 43688933 is about 6609.7604343879. The cubic root of 43688933 is about 352.2009145916.

The spelling of 43688933 in words is "forty-three million, six hundred eighty-eight thousand, nine hundred thirty-three".