199929271 has 4 divisors (see below), whose sum is σ = 208621872. Its totient is φ = 191236672.

The previous prime is 199929253. The next prime is 199929287. The reversal of 199929271 is 172929991.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 172929991 = 13 ⋅13302307.

It is a cyclic number.

It is not a de Polignac number, because 199929271 - 2⁷ = 199929143 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199929221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4346266 + ... + 4346311.

It is an arithmetic number, because the mean of its divisors is an integer number (52155468).

Almost surely, 2^199929271 is an apocalyptic number.

199929271 is a deficient number, since it is larger than the sum of its proper divisors (8692601).

199929271 is an equidigital number, since it uses as much as digits as its factorization.

199929271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8692600.

The product of its digits is 183708, while the sum is 49.

The square root of 199929271 is about 14139.6347548301. The cubic root of 199929271 is about 584.7346018976.

The spelling of 199929271 in words is "one hundred ninety-nine million, nine hundred twenty-nine thousand, two hundred seventy-one".