63891285 has 8 divisors (see below), whose sum is σ = 102226080. Its totient is φ = 34075344.

The previous prime is 63891259. The next prime is 63891293. The reversal of 63891285 is 58219836.

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

It is not a de Polignac number, because 63891285 - 2⁶ = 63891221 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 7 ways as a sum of consecutive naturals, for example, 2129695 + ... + 2129724.

It is an arithmetic number, because the mean of its divisors is an integer number (12778260).

Almost surely, 2^63891285 is an apocalyptic number.

It is an amenable number.

63891285 is a deficient number, since it is larger than the sum of its proper divisors (38334795).

63891285 is a wasteful number, since it uses less digits than its factorization.

63891285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4259427.

The product of its digits is 103680, while the sum is 42.

The square root of 63891285 is about 7993.2024245605. The cubic root of 63891285 is about 399.7733820517.

The spelling of 63891285 in words is "sixty-three million, eight hundred ninety-one thousand, two hundred eighty-five".