63911994 has 8 divisors (see below), whose sum is σ = 127824000. Its totient is φ = 21303996.

The previous prime is 63911983. The next prime is 63912019. The reversal of 63911994 is 49911936.

It is a sphenic number, since it is the product of 3 distinct primes.

63911994 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5325994 + ... + 5326005.

It is an arithmetic number, because the mean of its divisors is an integer number (15978000).

Almost surely, 2^63911994 is an apocalyptic number.

63911994 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63911994 is a wasteful number, since it uses less digits than its factorization.

63911994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10652004.

The product of its digits is 52488, while the sum is 42.

The square root of 63911994 is about 7994.4977328160. The cubic root of 63911994 is about 399.8165700632.

It can be divided in two parts, 6391 and 1994, that added together give a triangular number (8385 = T₁₂₉).

The spelling of 63911994 in words is "sixty-three million, nine hundred eleven thousand, nine hundred ninety-four".