63109643 has 4 divisors (see below), whose sum is σ = 63591528. Its totient is φ = 62627760.

The previous prime is 63109639. The next prime is 63109663. The reversal of 63109643 is 34690136.

It is a happy number.

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 63109643 - 2² = 63109639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63109603) 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, 240746 + ... + 241007.

It is an arithmetic number, because the mean of its divisors is an integer number (15897882).

Almost surely, 2^63109643 is an apocalyptic number.

63109643 is a deficient number, since it is larger than the sum of its proper divisors (481885).

63109643 is a wasteful number, since it uses less digits than its factorization.

63109643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481884.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 63109643 is about 7944.1577904772. The cubic root of 63109643 is about 398.1364207478.

Adding to 63109643 its reverse (34690136), we get a palindrome (97799779).

The spelling of 63109643 in words is "sixty-three million, one hundred nine thousand, six hundred forty-three".