8223722789 has 2 divisors, whose sum is σ = 8223722790. Its totient is φ = 8223722788.

The previous prime is 8223722779. The next prime is 8223722813. The reversal of 8223722789 is 9872273228.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6721540225 + 1502182564 = 81985^2 + 38758^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8223722789 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8223722779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4111861394 + 4111861395.

It is an arithmetic number, because the mean of its divisors is an integer number (4111861395).

Almost surely, 2^8223722789 is an apocalyptic number.

It is an amenable number.

8223722789 is a deficient number, since it is larger than the sum of its proper divisors (1).

8223722789 is an equidigital number, since it uses as much as digits as its factorization.

8223722789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1354752, while the sum is 50.

The square root of 8223722789 is about 90684.7439705268. The cubic root of 8223722789 is about 2018.4724252236.

The spelling of 8223722789 in words is "eight billion, two hundred twenty-three million, seven hundred twenty-two thousand, seven hundred eighty-nine".