8424220999 has 2 divisors, whose sum is σ = 8424221000. Its totient is φ = 8424220998.

The previous prime is 8424220967. The next prime is 8424221059. The reversal of 8424220999 is 9990224248.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8424220999 - 2⁵ = 8424220967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8424220099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4212110499 + 4212110500.

It is an arithmetic number, because the mean of its divisors is an integer number (4212110500).

Almost surely, 2^8424220999 is an apocalyptic number.

8424220999 is a deficient number, since it is larger than the sum of its proper divisors (1).

8424220999 is an equidigital number, since it uses as much as digits as its factorization.

8424220999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 746496, while the sum is 49.

The square root of 8424220999 is about 91783.5551664894. Note that the first 3 decimals coincide. The cubic root of 8424220999 is about 2034.7446589658.

The spelling of 8424220999 in words is "eight billion, four hundred twenty-four million, two hundred twenty thousand, nine hundred ninety-nine".