199999317 has 16 divisors (see below), whose sum is σ = 306707072. Its totient is φ = 113555520.

The previous prime is 199999309. The next prime is 199999333. The reversal of 199999317 is 713999991.

It is not a de Polignac number, because 199999317 - 2³ = 199999309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199999307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27034 + ... + 33627.

It is an arithmetic number, because the mean of its divisors is an integer number (19169192).

Almost surely, 2^199999317 is an apocalyptic number.

It is an amenable number.

199999317 is a deficient number, since it is larger than the sum of its proper divisors (106707755).

199999317 is a wasteful number, since it uses less digits than its factorization.

199999317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60828.

The product of its digits is 1240029, while the sum is 57.

The square root of 199999317 is about 14142.1114760138. Note that the first 3 decimals coincide. The cubic root of 199999317 is about 584.8028819404.

The spelling of 199999317 in words is "one hundred ninety-nine million, nine hundred ninety-nine thousand, three hundred seventeen".