821068195 has 4 divisors (see below), whose sum is σ = 985281840. Its totient is φ = 656854552.

The previous prime is 821068189. The next prime is 821068247. The reversal of 821068195 is 591860128.

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

It is a cyclic number.

It is not a de Polignac number, because 821068195 - 2⁷ = 821068067 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82106815 + ... + 82106824.

It is an arithmetic number, because the mean of its divisors is an integer number (246320460).

Almost surely, 2^821068195 is an apocalyptic number.

821068195 is a deficient number, since it is larger than the sum of its proper divisors (164213645).

821068195 is a wasteful number, since it uses less digits than its factorization.

821068195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164213644.

The product of its (nonzero) digits is 34560, while the sum is 40.

The square root of 821068195 is about 28654.2875500334. The cubic root of 821068195 is about 936.3964168580.

The spelling of 821068195 in words is "eight hundred twenty-one million, sixty-eight thousand, one hundred ninety-five".