999707999 has 8 divisors (see below), whose sum is σ = 1010969328. Its totient is φ = 988473600.

The previous prime is 999707963. The next prime is 999708011.

999707999 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 999707999 - 2²⁰ = 998659423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999707939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73199 + ... + 85775.

It is an arithmetic number, because the mean of its divisors is an integer number (126371166).

Almost surely, 2^999707999 is an apocalyptic number.

999707999 is a deficient number, since it is larger than the sum of its proper divisors (11261329).

999707999 is a wasteful number, since it uses less digits than its factorization.

999707999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13465.

The product of its (nonzero) digits is 26040609, while the sum is 68.

The square root of 999707999 is about 31618.1593234015. The cubic root of 999707999 is about 999.9026568580.

The spelling of 999707999 in words is "nine hundred ninety-nine million, seven hundred seven thousand, nine hundred ninety-nine".