199749885 has 16 divisors (see below), whose sum is σ = 319878720. Its totient is φ = 106440320.

The previous prime is 199749877. The next prime is 199749889. The reversal of 199749885 is 588947991.

It is not a de Polignac number, because 199749885 - 2³ = 199749877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199749889) 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, 14170 + ... + 24500.

It is an arithmetic number, because the mean of its divisors is an integer number (19992420).

Almost surely, 2^199749885 is an apocalyptic number.

199749885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

199749885 is a deficient number, since it is larger than the sum of its proper divisors (120128835).

199749885 is a wasteful number, since it uses less digits than its factorization.

199749885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11628.

The product of its digits is 6531840, while the sum is 60.

The square root of 199749885 is about 14133.2899566944. The cubic root of 199749885 is about 584.5596657179.

The spelling of 199749885 in words is "one hundred ninety-nine million, seven hundred forty-nine thousand, eight hundred eighty-five".