63821201 has 4 divisors (see below), whose sum is σ = 63900900. Its totient is φ = 63741504.

The previous prime is 63821161. The next prime is 63821227. The reversal of 63821201 is 10212836.

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 22848400 + 40972801 = 4780^2 + 6401^2 .

It is a cyclic number.

It is not a de Polignac number, because 63821201 - 2⁶ = 63821137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63821231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38636 + ... + 40253.

It is an arithmetic number, because the mean of its divisors is an integer number (15975225).

Almost surely, 2^63821201 is an apocalyptic number.

It is an amenable number.

63821201 is a deficient number, since it is larger than the sum of its proper divisors (79699).

63821201 is an equidigital number, since it uses as much as digits as its factorization.

63821201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79698.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 63821201 is about 7988.8172466267. The cubic root of 63821201 is about 399.6271546572.

The spelling of 63821201 in words is "sixty-three million, eight hundred twenty-one thousand, two hundred one".