199809102 has 32 divisors (see below), whose sum is σ = 411494400. Its totient is φ = 64633248.

The previous prime is 199809097. The next prime is 199809107. The reversal of 199809102 is 201908991.

It is a happy number.

199809102 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (199809097) and next prime (199809107).

199809102 is a modest number, since divided by 9102 gives 1998 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199809107) 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, 105399 + ... + 107277.

It is an arithmetic number, because the mean of its divisors is an integer number (12859200).

Almost surely, 2^199809102 is an apocalyptic number.

199809102 is an abundant number, since it is smaller than the sum of its proper divisors (211685298).

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

199809102 is a wasteful number, since it uses less digits than its factorization.

199809102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2400.

The product of its (nonzero) digits is 11664, while the sum is 39.

The square root of 199809102 is about 14135.3847489200. The cubic root of 199809102 is about 584.6174253667.

The spelling of 199809102 in words is "one hundred ninety-nine million, eight hundred nine thousand, one hundred two".