63861998 has 8 divisors (see below), whose sum is σ = 97363560. Its totient is φ = 31407480.

The previous prime is 63861989. The next prime is 63862003. The reversal of 63861998 is 89916836.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261608 + ... + 261851.

It is an arithmetic number, because the mean of its divisors is an integer number (12170445).

Almost surely, 2^63861998 is an apocalyptic number.

63861998 is a deficient number, since it is larger than the sum of its proper divisors (33501562).

63861998 is a wasteful number, since it uses less digits than its factorization.

63861998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523522.

The product of its digits is 559872, while the sum is 50.

The square root of 63861998 is about 7991.3702204315. The cubic root of 63861998 is about 399.7122889388.

The spelling of 63861998 in words is "sixty-three million, eight hundred sixty-one thousand, nine hundred ninety-eight".