63881998 has 4 divisors (see below), whose sum is σ = 95823000. Its totient is φ = 31940998.

The previous prime is 63881981. The next prime is 63882011. The reversal of 63881998 is 89918836.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15970498 + ... + 15970501.

It is an arithmetic number, because the mean of its divisors is an integer number (23955750).

Almost surely, 2^63881998 is an apocalyptic number.

63881998 is a deficient number, since it is larger than the sum of its proper divisors (31941002).

63881998 is a wasteful number, since it uses less digits than its factorization.

63881998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31941001.

The product of its digits is 746496, while the sum is 52.

The square root of 63881998 is about 7992.6214723331. The cubic root of 63881998 is about 399.7540112549.

The spelling of 63881998 in words is "sixty-three million, eight hundred eighty-one thousand, nine hundred ninety-eight".