199999995 has 16 divisors (see below), whose sum is σ = 344615712. Its totient is φ = 98461440.

The previous prime is 199999991. The next prime is 200000033. The reversal of 199999995 is 599999991.

It is not a de Polignac number, because 199999995 - 2² = 199999991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (199999991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 512626 + ... + 513015.

It is an arithmetic number, because the mean of its divisors is an integer number (21538482).

Almost surely, 2^199999995 is an apocalyptic number.

199999995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

199999995 is a deficient number, since it is larger than the sum of its proper divisors (144615717).

199999995 is a wasteful number, since it uses less digits than its factorization.

199999995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025662.

The product of its digits is 23914845, while the sum is 69.

The square root of 199999995 is about 14142.1354469543. The cubic root of 199999995 is about 584.8035427692.

The spelling of 199999995 in words is "one hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-five".