199971206 has 4 divisors (see below), whose sum is σ = 299956812. Its totient is φ = 99985602.

The previous prime is 199971203. The next prime is 199971209. The reversal of 199971206 is 602179991.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (199971203) and next prime (199971209).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199971203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49992800 + ... + 49992803.

It is an arithmetic number, because the mean of its divisors is an integer number (74989203).

Almost surely, 2^199971206 is an apocalyptic number.

199971206 is a deficient number, since it is larger than the sum of its proper divisors (99985606).

199971206 is an equidigital number, since it uses as much as digits as its factorization.

199971206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99985605.

The product of its (nonzero) digits is 61236, while the sum is 44.

The square root of 199971206 is about 14141.1175654543. The cubic root of 199971206 is about 584.7754815734.

The spelling of 199971206 in words is "one hundred ninety-nine million, nine hundred seventy-one thousand, two hundred six".