63643243 has 4 divisors (see below), whose sum is σ = 63873280. Its totient is φ = 63413208.

The previous prime is 63643211. The next prime is 63643253. The reversal of 63643243 is 34234636.

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 63643243 - 2⁵ = 63643211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63643253) 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, 114603 + ... + 115156.

It is an arithmetic number, because the mean of its divisors is an integer number (15968320).

Almost surely, 2^63643243 is an apocalyptic number.

63643243 is a deficient number, since it is larger than the sum of its proper divisors (230037).

63643243 is a wasteful number, since it uses less digits than its factorization.

63643243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230036.

The product of its digits is 31104, while the sum is 31.

The square root of 63643243 is about 7977.6715274571. The cubic root of 63643243 is about 399.2553709290.

Adding to 63643243 its reverse (34234636), we get a palindrome (97877879).

The spelling of 63643243 in words is "sixty-three million, six hundred forty-three thousand, two hundred forty-three".