999929999 has 8 divisors (see below), whose sum is σ = 1010405760. Its totient is φ = 989501400.

The previous prime is 999929989. The next prime is 999930023.

999929999 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 999929999 - 2⁸ = 999929743 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 (999929989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31664 + ... + 54794.

It is an arithmetic number, because the mean of its divisors is an integer number (126300720).

Almost surely, 2^999929999 is an apocalyptic number.

999929999 is a deficient number, since it is larger than the sum of its proper divisors (10475761).

999929999 is a wasteful number, since it uses less digits than its factorization.

999929999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23581.

The product of its digits is 86093442, while the sum is 74.

The square root of 999929999 is about 31621.6697693212. The cubic root of 999929999 is about 999.9766657889.

The spelling of 999929999 in words is "nine hundred ninety-nine million, nine hundred twenty-nine thousand, nine hundred ninety-nine".