63638213 has 8 divisors (see below), whose sum is σ = 65664000. Its totient is φ = 61643088.

The previous prime is 63638203. The next prime is 63638227. The reversal of 63638213 is 31283636.

63638213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 63638213 - 2⁸ = 63637957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 63638213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63638203) 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 7 ways as a sum of consecutive naturals, for example, 3413 + ... + 11786.

It is an arithmetic number, because the mean of its divisors is an integer number (8208000).

Almost surely, 2^63638213 is an apocalyptic number.

It is an amenable number.

63638213 is a deficient number, since it is larger than the sum of its proper divisors (2025787).

63638213 is a wasteful number, since it uses less digits than its factorization.

63638213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15331.

The product of its digits is 15552, while the sum is 32.

The square root of 63638213 is about 7977.3562663329. The cubic root of 63638213 is about 399.2448523606.

The spelling of 63638213 in words is "sixty-three million, six hundred thirty-eight thousand, two hundred thirteen".