199959606 has 48 divisors (see below), whose sum is σ = 540154368. Its totient is φ = 51937200.

The previous prime is 199959587. The next prime is 199959623. The reversal of 199959606 is 606959991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70750 + ... + 73521.

It is an arithmetic number, because the mean of its divisors is an integer number (11253216).

Almost surely, 2^199959606 is an apocalyptic number.

199959606 is an abundant number, since it is smaller than the sum of its proper divisors (340194762).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199959606 is a wasteful number, since it uses less digits than its factorization.

199959606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144297 (or 144294 counting only the distinct ones).

The product of its (nonzero) digits is 1180980, while the sum is 54.

The square root of 199959606 is about 14140.7074080472. The cubic root of 199959606 is about 584.7641740675.

It can be divided in two parts, 199 and 959606, that added together give a triangular number (959805 = T₁₃₈₅).

The spelling of 199959606 in words is "one hundred ninety-nine million, nine hundred fifty-nine thousand, six hundred six".