999998195 has 16 divisors (see below), whose sum is σ = 1388789760. Its totient is φ = 677031264.

The previous prime is 999998183. The next prime is 999998203. The reversal of 999998195 is 591899999.

It is not a de Polignac number, because 999998195 - 2²² = 995803891 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178067 + ... + 183596.

It is an arithmetic number, because the mean of its divisors is an integer number (86799360).

Almost surely, 2^999998195 is an apocalyptic number.

999998195 is a deficient number, since it is larger than the sum of its proper divisors (388791565).

999998195 is a wasteful number, since it uses less digits than its factorization.

999998195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361754.

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

The square root of 999998195 is about 31622.7480621150. The cubic root of 999998195 is about 999.9993983330. Note that the first 3 decimals are identical.

The spelling of 999998195 in words is "nine hundred ninety-nine million, nine hundred ninety-eight thousand, one hundred ninety-five".