38643233 has 2 divisors, whose sum is σ = 38643234. Its totient is φ = 38643232.

The previous prime is 38643221. The next prime is 38643271. The reversal of 38643233 is 33234683.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38588944 + 54289 = 6212^2 + 233^2 .

It is an emirp because it is prime and its reverse (33234683) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38643233 - 2⁴ = 38643217 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 38643233.

It is not a weakly prime, because it can be changed into another prime (38643203) 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 as a sum of consecutive naturals, namely, 19321616 + 19321617.

It is an arithmetic number, because the mean of its divisors is an integer number (19321617).

Almost surely, 2^38643233 is an apocalyptic number.

It is an amenable number.

38643233 is a deficient number, since it is larger than the sum of its proper divisors (1).

38643233 is an equidigital number, since it uses as much as digits as its factorization.

38643233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 32.

The square root of 38643233 is about 6216.3681519035. The cubic root of 38643233 is about 338.0838960538.

The spelling of 38643233 in words is "thirty-eight million, six hundred forty-three thousand, two hundred thirty-three".