8722143643 has 4 divisors (see below), whose sum is σ = 8744917248. Its totient is φ = 8699370040.

The previous prime is 8722143613. The next prime is 8722143649. The reversal of 8722143643 is 3463412278.

It is a happy number.

8722143643 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 not a de Polignac number, because 8722143643 - 2²⁹ = 8185272731 is a prime.

It is a super-2 number, since 2×8722143643² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8722143596 and 8722143605.

It is not an unprimeable number, because it can be changed into a prime (8722143649) 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, 11386228 + ... + 11386993.

It is an arithmetic number, because the mean of its divisors is an integer number (2186229312).

Almost surely, 2^8722143643 is an apocalyptic number.

8722143643 is a deficient number, since it is larger than the sum of its proper divisors (22773605).

8722143643 is a wasteful number, since it uses less digits than its factorization.

8722143643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22773604.

The product of its digits is 193536, while the sum is 40.

The square root of 8722143643 is about 93392.4174812923. The cubic root of 8722143643 is about 2058.4535824773.

The spelling of 8722143643 in words is "eight billion, seven hundred twenty-two million, one hundred forty-three thousand, six hundred forty-three".