63994375 has 40 divisors (see below), whose sum is σ = 89408880. Its totient is φ = 45504000.

The previous prime is 63994367. The next prime is 63994391. The reversal of 63994375 is 57349936.

63994375 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 63994375 - 2³ = 63994367 is a prime.

It is a congruent number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 201717 + ... + 202033.

It is an arithmetic number, because the mean of its divisors is an integer number (2235222).

Almost surely, 2^63994375 is an apocalyptic number.

63994375 is a deficient number, since it is larger than the sum of its proper divisors (25414505).

63994375 is a wasteful number, since it uses less digits than its factorization.

63994375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373 (or 358 counting only the distinct ones).

The product of its digits is 612360, while the sum is 46.

The square root of 63994375 is about 7999.6484297749. The cubic root of 63994375 is about 399.9882809067.

The spelling of 63994375 in words is "sixty-three million, nine hundred ninety-four thousand, three hundred seventy-five".