199729027 has 4 divisors (see below), whose sum is σ = 199947280. Its totient is φ = 199510776.

The previous prime is 199729021. The next prime is 199729037. The reversal of 199729027 is 720927991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 720927991 = 7 ⋅102989713.

It is a cyclic number.

It is not a de Polignac number, because 199729027 - 2¹⁹ = 199204739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199729021) 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, 107748 + ... + 109585.

It is an arithmetic number, because the mean of its divisors is an integer number (49986820).

Almost surely, 2^199729027 is an apocalyptic number.

199729027 is a deficient number, since it is larger than the sum of its proper divisors (218253).

199729027 is an equidigital number, since it uses as much as digits as its factorization.

199729027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218252.

The product of its (nonzero) digits is 142884, while the sum is 46.

The square root of 199729027 is about 14132.5520342223. The cubic root of 199729027 is about 584.5393183221.

The spelling of 199729027 in words is "one hundred ninety-nine million, seven hundred twenty-nine thousand, twenty-seven".