199612900 has 18 divisors (see below), whose sum is σ = 433160210. Its totient is φ = 79845120.

The previous prime is 199612873. The next prime is 199612913. The reversal of 199612900 is 9216991.

It can be written as a sum of positive squares in 3 ways, for example, as 746496 + 198866404 = 864^2 + 14102^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 199612900.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 997965 + ... + 998164.

Almost surely, 2^199612900 is an apocalyptic number.

199612900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199612900 is an abundant number, since it is smaller than the sum of its proper divisors (233547310).

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

199612900 is a wasteful number, since it uses less digits than its factorization.

199612900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1996143 (or 1996136 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 37.

The square root of 199612900 is about 14128.4429432263. The cubic root of 199612900 is about 584.4260082064.

The spelling of 199612900 in words is "one hundred ninety-nine million, six hundred twelve thousand, nine hundred".