199919896 has 16 divisors (see below), whose sum is σ = 408927240. Its totient is φ = 90872640.

The previous prime is 199919879. The next prime is 199919897. The reversal of 199919896 is 698919991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199919897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1135821 + ... + 1135996.

Almost surely, 2^199919896 is an apocalyptic number.

It is an amenable number.

199919896 is an abundant number, since it is smaller than the sum of its proper divisors (209007344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199919896 is a wasteful number, since it uses less digits than its factorization.

199919896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2271834 (or 2271830 counting only the distinct ones).

The product of its digits is 2834352, while the sum is 61.

The square root of 199919896 is about 14139.3032360156. The cubic root of 199919896 is about 584.7254620444.

The spelling of 199919896 in words is "one hundred ninety-nine million, nine hundred nineteen thousand, eight hundred ninety-six".