199408947 has 8 divisors (see below), whose sum is σ = 273064656. Its totient is φ = 129346272.

The previous prime is 199408903. The next prime is 199408961. The reversal of 199408947 is 749804991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 199408947 - 2¹¹ = 199406899 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 199408947.

It is not an unprimeable number, because it can be changed into a prime (199408987) 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 7 ways as a sum of consecutive naturals, for example, 898128 + ... + 898349.

It is an arithmetic number, because the mean of its divisors is an integer number (34133082).

Almost surely, 2^199408947 is an apocalyptic number.

199408947 is a deficient number, since it is larger than the sum of its proper divisors (73655709).

199408947 is a wasteful number, since it uses less digits than its factorization.

199408947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1796517.

The product of its (nonzero) digits is 653184, while the sum is 51.

The square root of 199408947 is about 14121.2232827047. The cubic root of 199408947 is about 584.2268960641.

The spelling of 199408947 in words is "one hundred ninety-nine million, four hundred eight thousand, nine hundred forty-seven".