199711992 has 32 divisors (see below), whose sum is σ = 506736000. Its totient is φ = 65576544.

The previous prime is 199711979. The next prime is 199711997. The reversal of 199711992 is 299117991.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199711997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60492 + ... + 63707.

It is an arithmetic number, because the mean of its divisors is an integer number (15835500).

Almost surely, 2^199711992 is an apocalyptic number.

199711992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

199711992 is an abundant number, since it is smaller than the sum of its proper divisors (307024008).

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

199711992 is a wasteful number, since it uses less digits than its factorization.

199711992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124275 (or 124271 counting only the distinct ones).

The product of its digits is 91854, while the sum is 48.

The square root of 199711992 is about 14131.9493347521. The cubic root of 199711992 is about 584.5226992882.

The spelling of 199711992 in words is "one hundred ninety-nine million, seven hundred eleven thousand, nine hundred ninety-two".