63505243 has 2 divisors, whose sum is σ = 63505244. Its totient is φ = 63505242.

The previous prime is 63505237. The next prime is 63505279. The reversal of 63505243 is 34250536.

63505243 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 is a cyclic number.

It is not a de Polignac number, because 63505243 - 2¹³ = 63497051 is a prime.

It is a super-3 number, since 3×63505243³ (a number of 24 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (63505223) 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, 31752621 + 31752622.

It is an arithmetic number, because the mean of its divisors is an integer number (31752622).

Almost surely, 2^63505243 is an apocalyptic number.

63505243 is a deficient number, since it is larger than the sum of its proper divisors (1).

63505243 is an equidigital number, since it uses as much as digits as its factorization.

63505243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 28.

The square root of 63505243 is about 7969.0176935429. The cubic root of 63505243 is about 398.9665887019.

Adding to 63505243 its reverse (34250536), we get a palindrome (97755779).

The spelling of 63505243 in words is "sixty-three million, five hundred five thousand, two hundred forty-three".