199791612 has 36 divisors (see below), whose sum is σ = 531611080. Its totient is φ = 63091872.

The previous prime is 199791589. The next prime is 199791623. The reversal of 199791612 is 216197991.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 145363 + ... + 146730.

Almost surely, 2^199791612 is an apocalyptic number.

199791612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

199791612 is an abundant number, since it is smaller than the sum of its proper divisors (331819468).

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

199791612 is a wasteful number, since it uses less digits than its factorization.

199791612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292122 (or 292117 counting only the distinct ones).

The product of its digits is 61236, while the sum is 45.

The square root of 199791612 is about 14134.7660751779. The cubic root of 199791612 is about 584.6003669894.

The spelling of 199791612 in words is "one hundred ninety-nine million, seven hundred ninety-one thousand, six hundred twelve".