63639943 has 2 divisors, whose sum is σ = 63639944. Its totient is φ = 63639942.

The previous prime is 63639907. The next prime is 63639971. The reversal of 63639943 is 34993636.

63639943 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63639943 - 2⁹ = 63639431 is a prime.

It is a super-3 number, since 3×63639943³ (a number of 24 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 63639943.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63633943) 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, 31819971 + 31819972.

It is an arithmetic number, because the mean of its divisors is an integer number (31819972).

Almost surely, 2^63639943 is an apocalyptic number.

63639943 is a deficient number, since it is larger than the sum of its proper divisors (1).

63639943 is an equidigital number, since it uses as much as digits as its factorization.

63639943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 314928, while the sum is 43.

The square root of 63639943 is about 7977.4646975089. The cubic root of 63639943 is about 399.2484701415.

The spelling of 63639943 in words is "sixty-three million, six hundred thirty-nine thousand, nine hundred forty-three".