8223720971 has 2 divisors, whose sum is σ = 8223720972. Its totient is φ = 8223720970.

The previous prime is 8223720937. The next prime is 8223720979. The reversal of 8223720971 is 1790273228.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8223720971 - 2³⁰ = 7149979147 is a prime.

It is not a weakly prime, because it can be changed into another prime (8223720979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4111860485 + 4111860486.

It is an arithmetic number, because the mean of its divisors is an integer number (4111860486).

Almost surely, 2^8223720971 is an apocalyptic number.

8223720971 is a deficient number, since it is larger than the sum of its proper divisors (1).

8223720971 is an equidigital number, since it uses as much as digits as its factorization.

8223720971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 8223720971 is about 90684.7339467895. The cubic root of 8223720971 is about 2018.4722764839.

The spelling of 8223720971 in words is "eight billion, two hundred twenty-three million, seven hundred twenty thousand, nine hundred seventy-one".