199101992 has 8 divisors (see below), whose sum is σ = 373316250. Its totient is φ = 99550992.

The previous prime is 199101979. The next prime is 199102003. The reversal of 199101992 is 299101991.

It is a happy number.

199101992 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 166771396 + 32330596 = 12914^2 + 5686^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12443867 + ... + 12443882.

Almost surely, 2^199101992 is an apocalyptic number.

It is an amenable number.

199101992 is a deficient number, since it is larger than the sum of its proper divisors (174214258).

199101992 is a wasteful number, since it uses less digits than its factorization.

199101992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24887755 (or 24887751 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 41.

The square root of 199101992 is about 14110.3505271839. The cubic root of 199101992 is about 583.9269706016.

Subtracting 199101992 from its reverse (299101991), we obtain a palindrome (99999999).

The spelling of 199101992 in words is "one hundred ninety-nine million, one hundred one thousand, nine hundred ninety-two".