199999895 has 4 divisors (see below), whose sum is σ = 239999880. Its totient is φ = 159999912.

The previous prime is 199999889. The next prime is 199999901. The reversal of 199999895 is 598999991.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (199999889) and next prime (199999901).

It is a cyclic number.

It is not a de Polignac number, because 199999895 - 2⁶ = 199999831 is a prime.

It is a super-2 number, since 2×199999895² = 79999916000022050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 19999985 + ... + 19999994.

It is an arithmetic number, because the mean of its divisors is an integer number (59999970).

Almost surely, 2^199999895 is an apocalyptic number.

199999895 is a deficient number, since it is larger than the sum of its proper divisors (39999985).

199999895 is an equidigital number, since it uses as much as digits as its factorization.

199999895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39999984.

The product of its digits is 21257640, while the sum is 68.

The square root of 199999895 is about 14142.1319114199. The cubic root of 199999895 is about 584.8034453019.

The spelling of 199999895 in words is "one hundred ninety-nine million, nine hundred ninety-nine thousand, eight hundred ninety-five".