199959885 has 12 divisors (see below), whose sum is σ = 346597212. Its totient is φ = 106645248.

The previous prime is 199959883. The next prime is 199959887. The reversal of 199959885 is 588959991.

It is an interprime number because it is at equal distance from previous prime (199959883) and next prime (199959887).

It can be written as a sum of positive squares in 2 ways, for example, as 28323684 + 171636201 = 5322^2 + 13101^2 .

It is not a de Polignac number, because 199959885 - 2¹ = 199959883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199959883) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2221732 + ... + 2221821.

It is an arithmetic number, because the mean of its divisors is an integer number (28883101).

Almost surely, 2^199959885 is an apocalyptic number.

199959885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

199959885 is a deficient number, since it is larger than the sum of its proper divisors (146637327).

199959885 is a wasteful number, since it uses less digits than its factorization.

199959885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4443564 (or 4443561 counting only the distinct ones).

The product of its digits is 10497600, while the sum is 63.

The square root of 199959885 is about 14140.7172731796. The cubic root of 199959885 is about 584.7644460377.

The spelling of 199959885 in words is "one hundred ninety-nine million, nine hundred fifty-nine thousand, eight hundred eighty-five".