8009999 has 2 divisors, whose sum is σ = 8010000. Its totient is φ = 8009998.

The previous prime is 8009987. The next prime is 8010011. The reversal of 8009999 is 9999008.

It is a balanced prime because it is at equal distance from previous prime (8009987) and next prime (8010011).

It is a cyclic number.

It is not a de Polignac number, because 8009999 - 2¹² = 8005903 is a prime.

It is a Sophie Germain prime.

8009999 is a modest number, since divided by 9999 gives 800 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8009929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4004999 + 4005000.

It is an arithmetic number, because the mean of its divisors is an integer number (4005000).

Almost surely, 2^8009999 is an apocalyptic number.

8009999 is a deficient number, since it is larger than the sum of its proper divisors (1).

8009999 is an equidigital number, since it uses as much as digits as its factorization.

8009999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52488, while the sum is 44.

The square root of 8009999 is about 2830.1941629507. The cubic root of 8009999 is about 200.0832903088.

The spelling of 8009999 in words is "eight million, nine thousand, nine hundred ninety-nine".