63842321 has 4 divisors (see below), whose sum is σ = 63862500. Its totient is φ = 63822144.

The previous prime is 63842267. The next prime is 63842329. The reversal of 63842321 is 12324836.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22420225 + 41422096 = 4735^2 + 6436^2 .

It is a cyclic number.

It is not a de Polignac number, because 63842321 - 2⁶ = 63842257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63842329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4196 + ... + 12053.

It is an arithmetic number, because the mean of its divisors is an integer number (15965625).

Almost surely, 2^63842321 is an apocalyptic number.

It is an amenable number.

63842321 is a deficient number, since it is larger than the sum of its proper divisors (20179).

63842321 is a wasteful number, since it uses less digits than its factorization.

63842321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20178.

The product of its digits is 6912, while the sum is 29.

The square root of 63842321 is about 7990.1389850240. The cubic root of 63842321 is about 399.6712319363.

The spelling of 63842321 in words is "sixty-three million, eight hundred forty-two thousand, three hundred twenty-one".