63913972 has 24 divisors (see below), whose sum is σ = 115105536. Its totient is φ = 31039008.

The previous prime is 63913963. The next prime is 63913973. The reversal of 63913972 is 27931936.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63913973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20373 + ... + 23299.

It is an arithmetic number, because the mean of its divisors is an integer number (4796064).

Almost surely, 2^63913972 is an apocalyptic number.

It is an amenable number.

63913972 is a deficient number, since it is larger than the sum of its proper divisors (51191564).

63913972 is a wasteful number, since it uses less digits than its factorization.

63913972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3087 (or 3085 counting only the distinct ones).

The product of its digits is 61236, while the sum is 40.

The square root of 63913972 is about 7994.6214419446. The cubic root of 63913972 is about 399.8206946360.

The spelling of 63913972 in words is "sixty-three million, nine hundred thirteen thousand, nine hundred seventy-two".