199994647 has 12 divisors (see below), whose sum is σ = 214163200. Its totient is φ = 186713856.

The previous prime is 199994633. The next prime is 199994689. The reversal of 199994647 is 746499991.

It is a de Polignac number, because none of the positive numbers 2^k-199994647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 199994591 and 199994600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199694647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33979 + ... + 39427.

Almost surely, 2^199994647 is an apocalyptic number.

199994647 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

199994647 is a deficient number, since it is larger than the sum of its proper divisors (14168553).

199994647 is a wasteful number, since it uses less digits than its factorization.

199994647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5610 (or 5593 counting only the distinct ones).

The product of its digits is 4408992, while the sum is 58.

The square root of 199994647 is about 14141.9463653346. The cubic root of 199994647 is about 584.7983301737.

The spelling of 199994647 in words is "one hundred ninety-nine million, nine hundred ninety-four thousand, six hundred forty-seven".