199999659 has 8 divisors (see below), whose sum is σ = 266746320. Its totient is φ = 133293056.

The previous prime is 199999649. The next prime is 199999661. The reversal of 199999659 is 956999991.

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

It is a cyclic number.

It is not a de Polignac number, because 199999659 - 2²⁴ = 183222443 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 199999659.

It is not an unprimeable number, because it can be changed into a prime (199999609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4747 + ... + 20555.

It is an arithmetic number, because the mean of its divisors is an integer number (33343290).

Almost surely, 2^199999659 is an apocalyptic number.

199999659 is a deficient number, since it is larger than the sum of its proper divisors (66746661).

199999659 is a wasteful number, since it uses less digits than its factorization.

199999659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20029.

The product of its digits is 15943230, while the sum is 66.

The square root of 199999659 is about 14142.1235675552. The cubic root of 199999659 is about 584.8032152790.

The spelling of 199999659 in words is "one hundred ninety-nine million, nine hundred ninety-nine thousand, six hundred fifty-nine".