63861863 has 8 divisors (see below), whose sum is σ = 68896128. Its totient is φ = 58845024.

The previous prime is 63861859. The next prime is 63861883. The reversal of 63861863 is 36816836.

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

It is a cyclic number.

It is not a de Polignac number, because 63861863 - 2² = 63861859 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63861863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63861883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3845 + ... + 11937.

It is an arithmetic number, because the mean of its divisors is an integer number (8612016).

Almost surely, 2^63861863 is an apocalyptic number.

63861863 is a deficient number, since it is larger than the sum of its proper divisors (5034265).

63861863 is a wasteful number, since it uses less digits than its factorization.

63861863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8713.

The product of its digits is 124416, while the sum is 41.

The square root of 63861863 is about 7991.3617738155. The cubic root of 63861863 is about 399.7120072836.

The spelling of 63861863 in words is "sixty-three million, eight hundred sixty-one thousand, eight hundred sixty-three".