199660347 has 12 divisors (see below), whose sum is σ = 289671720. Its totient is φ = 132519168.

The previous prime is 199660343. The next prime is 199660369. The reversal of 199660347 is 743066991.

It is not a de Polignac number, because 199660347 - 2² = 199660343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (199660343) 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 11 ways as a sum of consecutive naturals, for example, 46822 + ... + 50907.

It is an arithmetic number, because the mean of its divisors is an integer number (24139310).

Almost surely, 2^199660347 is an apocalyptic number.

199660347 is a deficient number, since it is larger than the sum of its proper divisors (90011373).

199660347 is a wasteful number, since it uses less digits than its factorization.

199660347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97962 (or 97959 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 199660347 is about 14130.1219739958. The cubic root of 199660347 is about 584.4723095961.

The spelling of 199660347 in words is "one hundred ninety-nine million, six hundred sixty thousand, three hundred forty-seven".