199970 has 8 divisors (see below), whose sum is σ = 359964. Its totient is φ = 79984.

The previous prime is 199967. The next prime is 199999. The reversal of 199970 is 79991.

It is a happy number.

199970 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 196249 + 3721 = 443^2 + 61^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 199970.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9989 + ... + 10008.

2¹⁹⁹⁹⁷⁰ is an apocalyptic number.

199970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199970 is a deficient number, since it is larger than the sum of its proper divisors (159994).

199970 is a wasteful number, since it uses less digits than its factorization.

199970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20004.

The product of its (nonzero) digits is 5103, while the sum is 35.

The square root of 199970 is about 447.1800532224. The cubic root of 199970 is about 58.4774306003.

The spelling of 199970 in words is "one hundred ninety-nine thousand, nine hundred seventy".