63981100 has 36 divisors (see below), whose sum is σ = 141803424. Its totient is φ = 25046080.

The previous prime is 63981091. The next prime is 63981107. The reversal of 63981100 is 118936.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (63981107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2107 + ... + 11506.

It is an arithmetic number, because the mean of its divisors is an integer number (3938984).

Almost surely, 2^63981100 is an apocalyptic number.

It is an amenable number.

63981100 is an abundant number, since it is smaller than the sum of its proper divisors (77822324).

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

63981100 is a wasteful number, since it uses less digits than its factorization.

63981100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13674 (or 13667 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 63981100 is about 7998.8186627776. The cubic root of 63981100 is about 399.9606211234.

The spelling of 63981100 in words is "sixty-three million, nine hundred eighty-one thousand, one hundred".