820041193 has 4 divisors (see below), whose sum is σ = 831274708. Its totient is φ = 808807680.

The previous prime is 820041191. The next prime is 820041221. The reversal of 820041193 is 391140028.

It is a happy number.

820041193 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 669929689 + 150111504 = 25883^2 + 12252^2 .

It is a cyclic number.

It is not a de Polignac number, because 820041193 - 2¹ = 820041191 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (820041191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5616648 + ... + 5616793.

It is an arithmetic number, because the mean of its divisors is an integer number (207818677).

Almost surely, 2^820041193 is an apocalyptic number.

It is an amenable number.

820041193 is a deficient number, since it is larger than the sum of its proper divisors (11233515).

820041193 is a wasteful number, since it uses less digits than its factorization.

820041193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11233514.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 820041193 is about 28636.3613784992. The cubic root of 820041193 is about 936.0058353211.

The spelling of 820041193 in words is "eight hundred twenty million, forty-one thousand, one hundred ninety-three".