999099903 has 8 divisors (see below), whose sum is σ = 1345866928. Its totient is φ = 659199744.

The previous prime is 999099901. The next prime is 999099919. The reversal of 999099903 is 309990999.

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

It is not a de Polignac number, because 999099903 - 2¹ = 999099901 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 (999099901) 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, 1716376 + ... + 1716957.

It is an arithmetic number, because the mean of its divisors is an integer number (168233366).

Almost surely, 2^999099903 is an apocalyptic number.

999099903 is a deficient number, since it is larger than the sum of its proper divisors (346767025).

999099903 is a wasteful number, since it uses less digits than its factorization.

999099903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3433433.

The product of its (nonzero) digits is 1594323, while the sum is 57.

The square root of 999099903 is about 31608.5416145699. The cubic root of 999099903 is about 999.6998776022.

The spelling of 999099903 in words is "nine hundred ninety-nine million, ninety-nine thousand, nine hundred three".