199930 has 8 divisors (see below), whose sum is σ = 359892.
Its totient is φ = 79968.
The previous prime is 199921. The next prime is 199931. The reversal of 199930 is 39991.
It can be written as a sum of positive squares in 2 ways, for example, as 199809 + 121 = 447^2 + 11^2
It is a sphenic number, since it is the product of 3 distinct primes.
It is a junction number, because it is equal to n+sod(n) for n = 199892 and 199901.
It is not an unprimeable number, because it can be changed into a prime (199931) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9987 + ... + 10006.
2199930 is an apocalyptic number.
199930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
199930 is a deficient number, since it is larger than the sum of its proper divisors (159962).
199930 is a wasteful number, since it uses less digits than its factorization.
199930 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 20000.
The product of its (nonzero) digits is 2187, while the sum is 31.
The square root of 199930 is about 447.1353262716.
The cubic root of 199930 is about 58.4735312601.
The spelling of 199930 in words is "one hundred ninety-nine thousand, nine hundred thirty".