63328891 has 8 divisors (see below), whose sum is σ = 64166960. Its totient is φ = 62495712.

The previous prime is 63328879. The next prime is 63328901. The reversal of 63328891 is 19882336.

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 63328891 - 2¹⁹ = 62804603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63328831) 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, 29821 + ... + 31873.

It is an arithmetic number, because the mean of its divisors is an integer number (8020870).

Almost surely, 2^63328891 is an apocalyptic number.

63328891 is a deficient number, since it is larger than the sum of its proper divisors (838069).

63328891 is a wasteful number, since it uses less digits than its factorization.

63328891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2445.

The product of its digits is 62208, while the sum is 40.

The square root of 63328891 is about 7957.9451493460. The cubic root of 63328891 is about 398.5969405648.

The spelling of 63328891 in words is "sixty-three million, three hundred twenty-eight thousand, eight hundred ninety-one".