199998711 has 24 divisors (see below), whose sum is σ = 317650944. Its totient is φ = 120249360.

The previous prime is 199998707. The next prime is 199998713. The reversal of 199998711 is 117899991.

It is a happy number.

It is not a de Polignac number, because 199998711 - 2² = 199998707 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199998713) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4620 + ... + 20526.

It is an arithmetic number, because the mean of its divisors is an integer number (13235456).

Almost surely, 2^199998711 is an apocalyptic number.

199998711 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

199998711 is a deficient number, since it is larger than the sum of its proper divisors (117652233).

199998711 is a wasteful number, since it uses less digits than its factorization.

199998711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16051 (or 16048 counting only the distinct ones).

The product of its digits is 367416, while the sum is 54.

The square root of 199998711 is about 14142.0900506255. The cubic root of 199998711 is about 584.8022912869.

The spelling of 199998711 in words is "one hundred ninety-nine million, nine hundred ninety-eight thousand, seven hundred eleven".