199808853 has 4 divisors (see below), whose sum is σ = 266411808. Its totient is φ = 133205900.

The previous prime is 199808849. The next prime is 199808863. The reversal of 199808853 is 358808991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 358808991 = 3 ⋅119602997.

It is a cyclic number.

It is not a de Polignac number, because 199808853 - 2² = 199808849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 199808796 and 199808805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199808813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33301473 + ... + 33301478.

It is an arithmetic number, because the mean of its divisors is an integer number (66602952).

Almost surely, 2^199808853 is an apocalyptic number.

It is an amenable number.

199808853 is a deficient number, since it is larger than the sum of its proper divisors (66602955).

199808853 is an equidigital number, since it uses as much as digits as its factorization.

199808853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66602954.

The product of its (nonzero) digits is 622080, while the sum is 51.

The square root of 199808853 is about 14135.3759412334. The cubic root of 199808853 is about 584.6171825185.

It can be divided in two parts, 199808 and 853, that added together give a triangular number (200661 = T₆₃₃).

The spelling of 199808853 in words is "one hundred ninety-nine million, eight hundred eight thousand, eight hundred fifty-three".