63876321 has 12 divisors (see below), whose sum is σ = 92751360. Its totient is φ = 42360120.

The previous prime is 63876287. The next prime is 63876341. The reversal of 63876321 is 12367836.

It is a happy number.

It is not a de Polignac number, because 63876321 - 2⁶ = 63876257 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (63876341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16861 + ... + 20298.

It is an arithmetic number, because the mean of its divisors is an integer number (7729280).

Almost surely, 2^63876321 is an apocalyptic number.

It is an amenable number.

63876321 is a deficient number, since it is larger than the sum of its proper divisors (28875039).

63876321 is a wasteful number, since it uses less digits than its factorization.

63876321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37356 (or 37353 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 63876321 is about 7992.2663243913. The cubic root of 63876321 is about 399.7421692606.

The spelling of 63876321 in words is "sixty-three million, eight hundred seventy-six thousand, three hundred twenty-one".