199998101 has 4 divisors (see below), whose sum is σ = 200026752. Its totient is φ = 199969452.

The previous prime is 199998089. The next prime is 199998107. The reversal of 199998101 is 101899991.

It is a happy number.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199998101 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199998107) 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, 3740 + ... + 20346.

It is an arithmetic number, because the mean of its divisors is an integer number (50006688).

Almost surely, 2^199998101 is an apocalyptic number.

It is an amenable number.

199998101 is a deficient number, since it is larger than the sum of its proper divisors (28651).

199998101 is a wasteful number, since it uses less digits than its factorization.

199998101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28650.

The product of its (nonzero) digits is 52488, while the sum is 47.

The square root of 199998101 is about 14142.0684837827. The cubic root of 199998101 is about 584.8016967335.

The spelling of 199998101 in words is "one hundred ninety-nine million, nine hundred ninety-eight thousand, one hundred one".