199979712 has 112 divisors (see below), whose sum is σ = 618947200. Its totient is φ = 63141120.

The previous prime is 199979701. The next prime is 199979743. The reversal of 199979712 is 217979991.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29787 + ... + 35877.

Almost surely, 2^199979712 is an apocalyptic number.

199979712 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 199979712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309473600).

199979712 is an abundant number, since it is smaller than the sum of its proper divisors (418967488).

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

199979712 is a wasteful number, since it uses less digits than its factorization.

199979712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6131 (or 6115 counting only the distinct ones).

The product of its digits is 642978, while the sum is 54.

The square root of 199979712 is about 14141.4183164207. The cubic root of 199979712 is about 584.7837728166.

The spelling of 199979712 in words is "one hundred ninety-nine million, nine hundred seventy-nine thousand, seven hundred twelve".