63606321 has 6 divisors (see below), whose sum is σ = 91875810. Its totient is φ = 42404208.

The previous prime is 63606313. The next prime is 63606329. The reversal of 63606321 is 12360636.

63606321 is a `hidden beast` number, since 636 + 0 + 6 + 3 + 21 = 666.

63606321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (63606313) and next prime (63606329).

It can be written as a sum of positive squares in only one way, i.e., 35569296 + 28037025 = 5964^2 + 5295^2 .

It is not a de Polignac number, because 63606321 - 2³ = 63606313 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (63606329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3533676 + ... + 3533693.

It is an arithmetic number, because the mean of its divisors is an integer number (15312635).

Almost surely, 2^63606321 is an apocalyptic number.

It is an amenable number.

63606321 is a deficient number, since it is larger than the sum of its proper divisors (28269489).

63606321 is a wasteful number, since it uses less digits than its factorization.

63606321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7067375 (or 7067372 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 63606321 is about 7975.3571079921. The cubic root of 63606321 is about 399.1781479713.

Adding to 63606321 its reverse (12360636), we get a palindrome (75966957).

The spelling of 63606321 in words is "sixty-three million, six hundred six thousand, three hundred twenty-one".