8223989573 has 4 divisors (see below), whose sum is σ = 8231353260. Its totient is φ = 8216625888.

The previous prime is 8223989537. The next prime is 8223989603. The reversal of 8223989573 is 3759893228.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1483251169 + 6740738404 = 38513^2 + 82102^2 .

It is a cyclic number.

It is not a de Polignac number, because 8223989573 - 2³⁰ = 7150247749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8223989533) 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, 3680168 + ... + 3682401.

It is an arithmetic number, because the mean of its divisors is an integer number (2057838315).

Almost surely, 2^8223989573 is an apocalyptic number.

It is an amenable number.

8223989573 is a deficient number, since it is larger than the sum of its proper divisors (7363687).

8223989573 is a wasteful number, since it uses less digits than its factorization.

8223989573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7363686.

The product of its digits is 6531840, while the sum is 56.

The square root of 8223989573 is about 90686.2149006121. The cubic root of 8223989573 is about 2018.4942519290.

The spelling of 8223989573 in words is "eight billion, two hundred twenty-three million, nine hundred eighty-nine thousand, five hundred seventy-three".