63645233 has 2 divisors, whose sum is σ = 63645234. Its totient is φ = 63645232.

The previous prime is 63645223. The next prime is 63645259. The reversal of 63645233 is 33254636.

63645233 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34668544 + 28976689 = 5888^2 + 5383^2 .

It is a cyclic number.

It is not a de Polignac number, because 63645233 - 2¹⁴ = 63628849 is a prime.

It is a Sophie Germain 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 63645233.

It is not a weakly prime, because it can be changed into another prime (63645223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31822616 + 31822617.

It is an arithmetic number, because the mean of its divisors is an integer number (31822617).

Almost surely, 2^63645233 is an apocalyptic number.

It is an amenable number.

63645233 is a deficient number, since it is larger than the sum of its proper divisors (1).

63645233 is an equidigital number, since it uses as much as digits as its factorization.

63645233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 32.

The square root of 63645233 is about 7977.7962495917. The cubic root of 63645233 is about 399.2595321977.

Adding to 63645233 its reverse (33254636), we get a palindrome (96899869).

The spelling of 63645233 in words is "sixty-three million, six hundred forty-five thousand, two hundred thirty-three".