199723992 has 64 divisors (see below), whose sum is σ = 550260480. Its totient is φ = 60020352.

The previous prime is 199723987. The next prime is 199723999. The reversal of 199723992 is 299327991.

It is a happy number.

199723992 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199723999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5973 + ... + 20859.

It is an arithmetic number, because the mean of its divisors is an integer number (8597820).

Almost surely, 2^199723992 is an apocalyptic number.

199723992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 199723992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275130240).

199723992 is an abundant number, since it is smaller than the sum of its proper divisors (350536488).

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

199723992 is a wasteful number, since it uses less digits than its factorization.

199723992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14952 (or 14948 counting only the distinct ones).

The product of its digits is 551124, while the sum is 51.

The square root of 199723992 is about 14132.3738982522. The cubic root of 199723992 is about 584.5344063667.

The spelling of 199723992 in words is "one hundred ninety-nine million, seven hundred twenty-three thousand, nine hundred ninety-two".