999916807 has 2 divisors, whose sum is σ = 999916808. Its totient is φ = 999916806.

The previous prime is 999916783. The next prime is 999916859. The reversal of 999916807 is 708619999.

999916807 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (708619999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999916807 - 2²³ = 991528199 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999916877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499958403 + 499958404.

It is an arithmetic number, because the mean of its divisors is an integer number (499958404).

Almost surely, 2^999916807 is an apocalyptic number.

999916807 is a deficient number, since it is larger than the sum of its proper divisors (1).

999916807 is an equidigital number, since it uses as much as digits as its factorization.

999916807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2204496, while the sum is 58.

The square root of 999916807 is about 31621.4611774978. The cubic root of 999916807 is about 999.9722682310.

The spelling of 999916807 in words is "nine hundred ninety-nine million, nine hundred sixteen thousand, eight hundred seven".