16499903 has 8 divisors (see below), whose sum is σ = 19123200. Its totient is φ = 13943160.

The previous prime is 16499897. The next prime is 16499929. The reversal of 16499903 is 30999461.

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

It is not a de Polignac number, because 16499903 - 2⁴ = 16499887 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 (16499933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16103 + ... + 17096.

It is an arithmetic number, because the mean of its divisors is an integer number (2390400).

Almost surely, 2^16499903 is an apocalyptic number.

16499903 is a deficient number, since it is larger than the sum of its proper divisors (2623297).

16499903 is an equidigital number, since it uses as much as digits as its factorization.

16499903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33277.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 16499903 is about 4062.0072624258. The cubic root of 16499903 is about 254.5816696038.

The spelling of 16499903 in words is "sixteen million, four hundred ninety-nine thousand, nine hundred three".