999910109 has 8 divisors (see below), whose sum is σ = 1108693920. Its totient is φ = 894106800.

The previous prime is 999910103. The next prime is 999910117. The reversal of 999910109 is 901019999.

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 999910109 - 2²⁰ = 998861533 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999910103) 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, 744419 + ... + 745760.

It is an arithmetic number, because the mean of its divisors is an integer number (138586740).

Almost surely, 2^999910109 is an apocalyptic number.

It is an amenable number.

999910109 is a deficient number, since it is larger than the sum of its proper divisors (108783811).

999910109 is a wasteful number, since it uses less digits than its factorization.

999910109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1490251.

The product of its (nonzero) digits is 59049, while the sum is 47.

The square root of 999910109 is about 31621.3552682361. The cubic root of 999910109 is about 999.9700354355.

The spelling of 999910109 in words is "nine hundred ninety-nine million, nine hundred ten thousand, one hundred nine".