199902 has 8 divisors (see below), whose sum is σ = 399816. Its totient is φ = 66632.
The previous prime is 199889. The next prime is 199909. The reversal of 199902 is 209991.
It is a sphenic number, since it is the product of 3 distinct primes.
199902 is an admirable number.
It is a self number, because there is not a number n which added to its sum of digits gives 199902.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (199909) by changing a digit.
199902 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16653 + ... + 16664.
It is an arithmetic number, because the mean of its divisors is an integer number (49977).
2199902 is an apocalyptic number.
199902 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
199902 is a wasteful number, since it uses less digits than its factorization.
199902 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 33322.
The product of its (nonzero) digits is 1458, while the sum is 30.
The square root of 199902 is about 447.1040147438. The cubic root of 199902 is about 58.4708014124.
The spelling of 199902 in words is "one hundred ninety-nine thousand, nine hundred two".
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