8643137443 has 4 divisors (see below), whose sum is σ = 8643428928. Its totient is φ = 8642845960.

The previous prime is 8643137431. The next prime is 8643137453. The reversal of 8643137443 is 3447313468.

8643137443 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8643137443 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8643137443.

It is not an unprimeable number, because it can be changed into a prime (8643137453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95488 + ... + 162493.

It is an arithmetic number, because the mean of its divisors is an integer number (2160857232).

Almost surely, 2^8643137443 is an apocalyptic number.

8643137443 is a deficient number, since it is larger than the sum of its proper divisors (291485).

8643137443 is a wasteful number, since it uses less digits than its factorization.

8643137443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291484.

The product of its digits is 580608, while the sum is 43.

The square root of 8643137443 is about 92968.4755333764. The cubic root of 8643137443 is about 2052.2194833640.

The spelling of 8643137443 in words is "eight billion, six hundred forty-three million, one hundred thirty-seven thousand, four hundred forty-three".