63968973 has 4 divisors (see below), whose sum is σ = 85291968. Its totient is φ = 42645980.

The previous prime is 63968963. The next prime is 63969001. The reversal of 63968973 is 37986936.

It is a happy number.

63968973 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 a cyclic number.

It is not a de Polignac number, because 63968973 - 2¹² = 63964877 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63968923) 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, 10661493 + ... + 10661498.

It is an arithmetic number, because the mean of its divisors is an integer number (21322992).

Almost surely, 2^63968973 is an apocalyptic number.

It is an amenable number.

63968973 is a deficient number, since it is larger than the sum of its proper divisors (21322995).

63968973 is a wasteful number, since it uses less digits than its factorization.

63968973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21322994.

The product of its digits is 1469664, while the sum is 51.

The square root of 63968973 is about 7998.0605774150. The cubic root of 63968973 is about 399.9353499682.

The spelling of 63968973 in words is "sixty-three million, nine hundred sixty-eight thousand, nine hundred seventy-three".