63987933 has 4 divisors (see below), whose sum is σ = 85317248. Its totient is φ = 42658620.

The previous prime is 63987923. The next prime is 63987941. The reversal of 63987933 is 33978936.

It is a happy number.

63987933 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 63987933 - 2¹² = 63983837 is a prime.

It is a super-2 number, since 2×63987933² = 8188911139224978, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63987923) 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 3 ways as a sum of consecutive naturals, for example, 10664653 + ... + 10664658.

It is an arithmetic number, because the mean of its divisors is an integer number (21329312).

Almost surely, 2^63987933 is an apocalyptic number.

It is an amenable number.

63987933 is a deficient number, since it is larger than the sum of its proper divisors (21329315).

63987933 is a wasteful number, since it uses less digits than its factorization.

63987933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21329314.

The product of its digits is 734832, while the sum is 48.

The square root of 63987933 is about 7999.2457769467. The cubic root of 63987933 is about 399.9748588365.

The spelling of 63987933 in words is "sixty-three million, nine hundred eighty-seven thousand, nine hundred thirty-three".