199999503 has 16 divisors (see below), whose sum is σ = 323232000. Its totient is φ = 121211640.

The previous prime is 199999483. The next prime is 199999589. The reversal of 199999503 is 305999991.

It is a happy number.

It is not a de Polignac number, because 199999503 - 2¹⁰ = 199998479 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 199999503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199999103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 336403 + ... + 336996.

It is an arithmetic number, because the mean of its divisors is an integer number (20202000).

Almost surely, 2^199999503 is an apocalyptic number.

199999503 is a deficient number, since it is larger than the sum of its proper divisors (123232497).

199999503 is a wasteful number, since it uses less digits than its factorization.

199999503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673419 (or 673413 counting only the distinct ones).

The product of its (nonzero) digits is 885735, while the sum is 54.

The square root of 199999503 is about 14142.1180521165. The cubic root of 199999503 is about 584.8030632299.

The spelling of 199999503 in words is "one hundred ninety-nine million, nine hundred ninety-nine thousand, five hundred three".