63316643 has 4 divisors (see below), whose sum is σ = 68187168. Its totient is φ = 58446120.

The previous prime is 63316579. The next prime is 63316651. The reversal of 63316643 is 34661336.

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

It is a cyclic number.

It is not a de Polignac number, because 63316643 - 2⁶ = 63316579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63316543) 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, 2435243 + ... + 2435268.

It is an arithmetic number, because the mean of its divisors is an integer number (17046792).

Almost surely, 2^63316643 is an apocalyptic number.

63316643 is a deficient number, since it is larger than the sum of its proper divisors (4870525).

63316643 is a wasteful number, since it uses less digits than its factorization.

63316643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4870524.

The product of its digits is 23328, while the sum is 32.

The square root of 63316643 is about 7957.1755667448. The cubic root of 63316643 is about 398.5712422881.

Adding to 63316643 its reverse (34661336), we get a palindrome (97977979).

The spelling of 63316643 in words is "sixty-three million, three hundred sixteen thousand, six hundred forty-three".