999343999 has 8 divisors (see below), whose sum is σ = 1002521520. Its totient is φ = 996172800.

The previous prime is 999343909. The next prime is 999344023.

999343999 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 999343999 - 2⁷ = 999343871 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 999343999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999343909) 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, 698617 + ... + 700045.

It is an arithmetic number, because the mean of its divisors is an integer number (125315190).

Almost surely, 2^999343999 is an apocalyptic number.

999343999 is a deficient number, since it is larger than the sum of its proper divisors (3177521).

999343999 is a wasteful number, since it uses less digits than its factorization.

999343999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3161.

The product of its digits is 19131876, while the sum is 64.

The square root of 999343999 is about 31612.4026135313. The cubic root of 999343999 is about 999.7812851673.

The spelling of 999343999 in words is "nine hundred ninety-nine million, three hundred forty-three thousand, nine hundred ninety-nine".