63942543 has 24 divisors (see below), whose sum is σ = 111113600. Its totient is φ = 34614864.

The previous prime is 63942523. The next prime is 63942547. The reversal of 63942543 is 34524936.

It is not a de Polignac number, because 63942543 - 2⁶ = 63942479 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63942498 and 63942507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63942547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25513 + ... + 27906.

Almost surely, 2^63942543 is an apocalyptic number.

63942543 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

63942543 is a deficient number, since it is larger than the sum of its proper divisors (47171057).

63942543 is a wasteful number, since it uses less digits than its factorization.

63942543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53451 (or 53448 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 63942543 is about 7996.4081311549. The cubic root of 63942543 is about 399.8802620773.

The spelling of 63942543 in words is "sixty-three million, nine hundred forty-two thousand, five hundred forty-three".