63990043 has 16 divisors (see below), whose sum is σ = 73785600. Its totient is φ = 54997920.

The previous prime is 63990041. The next prime is 63990067. The reversal of 63990043 is 34009936.

63990043 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 63990043 - 2¹ = 63990041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63989990 and 63990008.

It is not an unprimeable number, because it can be changed into a prime (63990041) 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 in 15 ways as a sum of consecutive naturals, for example, 12378 + ... + 16768.

It is an arithmetic number, because the mean of its divisors is an integer number (4611600).

Almost surely, 2^63990043 is an apocalyptic number.

63990043 is a deficient number, since it is larger than the sum of its proper divisors (9795557).

63990043 is a wasteful number, since it uses less digits than its factorization.

63990043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4482.

The product of its (nonzero) digits is 17496, while the sum is 34.

The square root of 63990043 is about 7999.3776632936. The cubic root of 63990043 is about 399.9792551741.

Adding to 63990043 its reverse (34009936), we get a palindrome (97999979).

The spelling of 63990043 in words is "sixty-three million, nine hundred ninety thousand, forty-three".