8223560809 has 2 divisors, whose sum is σ = 8223560810. Its totient is φ = 8223560808.

The previous prime is 8223560803. The next prime is 8223560831. The reversal of 8223560809 is 9080653228.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8185182784 + 38378025 = 90472^2 + 6195^2 .

It is a cyclic number.

It is not a de Polignac number, because 8223560809 - 2⁵ = 8223560777 is a prime.

It is not a weakly prime, because it can be changed into another prime (8223560803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4111780404 + 4111780405.

It is an arithmetic number, because the mean of its divisors is an integer number (4111780405).

Almost surely, 2^8223560809 is an apocalyptic number.

It is an amenable number.

8223560809 is a deficient number, since it is larger than the sum of its proper divisors (1).

8223560809 is an equidigital number, since it uses as much as digits as its factorization.

8223560809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 8223560809 is about 90683.8508721371. The cubic root of 8223560809 is about 2018.4591727377.

The spelling of 8223560809 in words is "eight billion, two hundred twenty-three million, five hundred sixty thousand, eight hundred nine".